Turinys
snapmirror - tūris, ir qtree atspindinti
snapmirror {
on |
off }
snapmirror status [ options ] [ volume | qtree ... ]
snapmirror initialize [ options ] destination
snapmirror update [ options ] destination
snapmirror quiesce destination
snapmirror resume destination
snapmirror break [ options ] destination
snapmirror resync [ options ] destination
snapmirror destinations [ option ] [ source ]
snapmirror release source destination
snapmirror { store | retrieve } volume tapedevices
snapmirror use destination tapedevices
snapmirror throttle <n> destination
snapmirror abort [ options ] destination …
snapmirror migrate [ options ] source destination
Snapmirror komanda yra naudojami siekiant kontroliuoti SnapMirror, atspindinti apimtis ir qtrees metodas. Jis leidžia vartotojui įjungti ir išjungti planuojama ir rankinis duomenų perdavimas, prašyti informacijos apie pervedimų, pradėti iniciacijos duomenų perdavimą, pradėti atnaujinti veidrodžio, laikinai pristabdyti atnaujinimai veidrodį, pertrauka veidrodis santykius, naujo sinchronizuoti sulaužytų veidrodėliai, sąrašas paskirties informacijos , išleisti vaikų veidrodėliai, parduotuvė apimties vaizdai į juostą, atkurti garso nuotraukas iš juostelių, ir nutraukti vykdomi pervedimai. SnapMirror gali būti naudojamas, atkartoti apimtis arba qtrees. Procesus ir elgesį, yra šiek tiek (o kartais subtiliai) skiriasi tarp įvairių rūšių duomenų dubliavimo.
SnapMirror procesas paskirties pagrįsta. Snapmirror inicijuoti komanda pradeda pirmąjį perdavimą, paprastų paskirties su visais duomenų šaltinio. Prieš pradinio perdavimo paskirties vietą turi būti pasirengusi būti perrašyti iš šaltinio duomenų paskirties apimtis turi būti apribota (žr. tūrio), ir paskirties qtrees turi dar nėra.
Asinchroniniam veidrodžių, paskirties periodiškai prašo atnaujinti iš šaltinio, priima duomenų perdavimą, ir įrašo tuos duomenis į diską. Šie atnaujinti perdavimai atliekami tik įtraukti pakeitimus, padarytus po paskutinio perdavimo šaltinį. "SnapMirror planavimo inicijuoja šių pervedimų automatiškai, atsižvelgiant į tvarkaraščių snapmirror.conf failą.
Sinchroniniai veidrodžiai pradžių elgtis asinchroniškai, bet perėjimas prie sinchroninio režimu pirmai progai pasitaikius. Šie veidrodžiai gali grįžti į asinchroniniu režimu klaidą (pvz., tinklo disko tarp mirrorów filers) arba vartotojo prašymu.
Snapmirror atnaujinimo komanda gali būti naudojamas, inicijuoti atskiri pervedimai, išskyrus nuo reguliariojo tuos snapmirror.conf.
Po pirminio perdavimo paskirties vieta yra prieinamas klientams, bet tik skaityti,. Paskirties statusas rodo, kad ji yra snapmirrored (žr. aggr, išreikšta tūrio procentais, arba qtree daugiau informacijos apie rodymo paskirties valstybės narės).
Norėdami naudoti raštu paskirties taip pat skaitote, yra naudinga, kai nelaimė šaltinis nepasiekiamas arba kai paskirties vietą, kurią norite naudoti kaip bandymo tūrio / qtree, galite baigti SnapMirror santykius su snapmirror pertraukos komandos. Ši komanda keičia paskirties statusą iš snapmirrored į Broken-off, todėl jis įrašomas. Snapmirror resync komanda gali pakeisti buvęs paskirties statusą atgal į snapmirrored ir naujo sinchronizuoti turinį su šaltinio. (Taikomas buvęs šaltinio, snapmirror resync gali paversti jį į buvusios paskirties veidrodį. Tokiu būdu, šaltinio ir paskirties vaidmenys gali būti panaikintas.)
Ātršuvējs stebi visas paskirties vietas, nei tiesioginės, veidrodžių ir veidrodžiai, veidrodžių, kiekvienas iš savo šaltinių. Šis sąrašas gali būti rodomas per snapmirror paskirtys komandą. Snapmirror spaudai komanda gali būti naudojamas papasakoti Filer, kad tam tikras tiesioginis veidrodis nebebus prašyti naujinimų.
Norėdami išsaugoti tinklo pralaidumas, juosta gali būti naudojama naudoti, pompą naują veidrodinį apimtis, vietoj snapmirror inicijuoti komandą. Į snapmirror parduotuvė komanda sąvartynų šaltinio vaizdas juosta. Snapmirror gauti komanda atkuria garso vaizdą iš juosta ir rengia atnaujinamų pervedimai per tinklo apimtį. Jei daug juostos yra naudojamos sukurti garso vaizdą, komanda snapmirror naudojimas pavesti laukimo parduotuvėje arba gauti procesą parašyti išvestį arba priima indėlį į ir iš naujos juostos prietaiso. Saugoti ir atkurti komandos gali būti naudojamas su qtrees.
Snapmirror migruoti komanda naudojama esamo šaltinio ir paskirties poros paskirties tūris rašyti "imituoti" šaltinio. Paskirties prisiima NFS bylomis šaltinio,, padėti Filer administratorių, kad būtų išvengta per NFS naujo montuoti ant kliento pusėje.
The snapmirror.conf file on the destination filer's root volume controls the configuration and scheduling of SnapMirror on the destination. See snapmirror.conf for more details on configuration and scheduling of SnapMirror.
Access to a source is controlled with the snapmirror.access option on the source filer. See options and protocolaccess (8) for information on setting the option.
(If the snapmirror.access option is set to "legacy”, access is controlled by the snapmirror.allow file on the source filer's root volume. See snapmirror.allow for more details.)
SnapMirror is a licensed service, and a license must be obtained before the snapmirror command can be used. SnapMirror must be licensed on both source and destination filers. See license for more details.
SnapMirror is supported on regular vfilers, as well as the physical filer named vfiler0. Use vfiler context or vfiler run to issue snapmirror commands on a specific vfiler. See vfiler for details on how to issue commands on vfilers. The use of SnapMirror on vfilers requires a MultiStore license.
When used on a vfiler, a few restrictions apply. The vfiler must be rooted on a volume and SnapMirror sources and destinations cannot be qtrees in shared volumes. Tape devices and Synchronous SnapMirror are not supported on vfilers. For a qtree SnapMirror, the vfiler must own the containing volume of the Qtree.
Kiekvienas vfiler turi savo / etc / snapmirror.conf failą savo šaknų tūrio. SnapMirror gali būti įjungtas arba išjungtas dėl tam vfiler nepriklausomai. Komandos SnapMirror, išduoti tam vfiler gali veikti tik jis turi išimtinę teisę į jų apimtis arba qtrees.
Dėl atgalinio suderinamumo, fizinis Failai (vfiler0.), Gali veikti visų apimčių ir visų qtrees, net jei jie priklauso vfilers. Jis labai rekomenduota, tačiau, kad visi laikymo vienetai apimtys ir qtrees), atspindi iš abiejų vfiler0 ar prieglobos vfiler, ne tiek. , Kai vfiler saugojimo įrenginiai atsispindi per vfiler0, palikti snapmirror, ant vfiler.
Snapmirror komanda turi daug subcommands. Beveik kiekviena komanda laikosi paskirties argumentą. Šis argumentas trunka tris skirtingas formas. Forma, naudojama tam tikro pritaikymo priklauso nuo to, ar jūs nurodant apimtį ar yra qtree,. Apimtys yra nurodyti jų pavadinimą:
vol1
Qtrees nurodyta jų visiškai kvalifikuota kelio: / Vol/vol1/qtree
Yra specialus takas, kuris gali būti naudojamas SnapMirror visus duomenis tūrio, kuris negyvena, qtree. Šis kelias gali būti naudojamas tik kaip SnapMirror šaltinio, niekada SnapMirror, paskirties. Kelias yra nurodyta taip: / Vol/vol1/-
Visos komandos, kurios nesako kitaip, gali imtis bet kurių iš šių formų kaip argumentas. Snapmirror subcommands:
apie
Leidžia SnapMirror duomenų perdavimo ir įsijungia SnapMirror tvarkaraščio. Ši komanda turi būti išduotas prieš inicijuoti jokių SnapMirror duomenų perdavimo Inicijuoti, atnaujinimą, Pakartotinai sinchronizuojami, saugoti ar atgauti subcommands,. Ši komanda taip pat įsijungia SnapMirror tvarkaraščio, kuris inicijuoja atnaujinimo pervedimus, kai laikas atitinka vieną iš, snapmirror.conf failą tvarkaraščių. Ši komanda turi būti išduotas už Failai reaguoti atnaujinti prašymus iš vietovių, šaltinio pusėje.
nuo
Paveikslėlio tekstų vertimas visų aktyvių SnapMirror, duomenų perdavimo ir išjungia komandos, kuri inicijuoja naujų pervedimus [inicijuoti, atnaujinimas, resync, saugoti ir atkurti), ir paverčia SnapMirror planavimo išjungtas.
Įjungimo / išjungimo būsenos į SnapMirror išlieka per krovimąsi, ir tai atsispindi pagal snapmirror.enable variantą. Ši parinktis gali būti užskaityti, ir darydama turi tą patį poveikį kaip snapmirror ar išjungti komandų snapmirror.
statusas [-L | T | Q] [kiekis | qtree ... ]
Ataskaitos statusas, visų SnapMirror santykių su šaltinio ir (arba) paskirties vietą dėl šio Failai. Ši komanda taip pat pranešimų ar SnapMirror, įjungti arba išjungti. Jei kuri nors tūris ar qtree argumentai pateikiami į komandą, tik SnapMirror santykiai su atitikimo šaltinį arba paskirties vietą bus pranešta. Jei argumentas yra neteisingas, nebus bet išėjimo statusas.
Be jokių galimybių, rodomas trumpas kiekvieno tokio santykiai statuso forma. Tai rodo, kad vietos pusėje santykių būklę, ar perdavimas vyksta (ir jei taip, tokio perdavimo pažanga), ir veidrodis atsilikimas, ty kiek laiko, veidrodis atsilieka šaltinio. Tai yra paprastas skirtumas dabartinį laiką ir paskutinio sėkmingo perdavimo šaltinis pusės timestamp. Laiko trukmė visada bus bent kiek paskutinio sėkmingo perdavimo trukme, išskyrus atvejus, kai dėl šaltinio ir paskirties laikrodžiai nėra sinchronizuojami (tokiu atveju ji gali netgi būti neigiamas).
Jei-l parinktis, išvestis rodo išsamesnę informaciją kiekvienam SnapMirror santykių. Jei * yra rodomi kartu su santykių statuso trumpą formą produkcijos snapmirror būsenos komandos, tada ypatinga informacija apie šiuos santykius ir yra prieinama, kuri matoma tik su-l variantas.
If the -t option is given, the output displays the relationships that are active. A relationship is considered as active if the source or destination is involved in:
1. data transfer to or from the network. 2. reading or writing to a tape device. 3. waiting for a tape change.
4. Performing local on-disk processing or cleanup.
If the -q option is given, the output displays the volumes and qtrees that are quiesced or quiescing. See the quiesce command, below, for what this means.
See the Examples section for more information on snapmirror status .
On a vfiler, the status command shows entries related to the vfiler only. On the physical filer, active transfer entries from all vfilers are displayed. Inactive transfers are only displayed on the relevant vfiler. The preferred way to get a comprehensive and more readable list of SnapMirror transfers is to run vfiler run * snapmirror status . It iterators through all vfilers and lists its transfers.
initialize [ -S source ] [ -k kilobytes ] [ -s src_snap ] [ -c create_dest_snap ] [ -w ] destination
Pradeda pradinį perdavimą tinklu. Pirminis perkėlimas arba per tinklą arba iš juostos prieš atnaujinimas pervedimai gali vykti. Inicijuoti komanda turi būti išduotas į paskirties Filer. Jei paskirties vieta yra tūris, ji turi būti ribojama (žr. tūrio informacijos apie tai, kaip patikrinti ir apriboti apimtis). Jei paskirties qtree, ji neturi jau (žr. už informacijos apie tai, kaip į sąrašą qtrees, qtree). Jei qtree jau egzistuoja, ji turi būti pervadintas arba pašalintas (naudojant NFS ar CIFS klientas), arba snapmirror inicijuoti kad qtree bus ne dirbti.
Jei komanda snapmirror statusas praneša, kad nutrauktas pradinis perdavimas iš naujo paleisti kompiuterį taskus, inicijuoti commmand "perkraukite perdavimą, kai buvo nutrauktas.
-S parametras nurodo šaltinio Failai ir apimtis ar qtree kelią, kad des_ t ination argumentų panašia forma. Šaltinis turi atitikti paskirties snapmirror.conf failo įrašą. Jei jis neatitinka, operacija atspausdina klaidos pranešimą ir nutraukia gyvenimą. Jei-S variantas nėra, šaltinis yra nurodyta įrašo tą paskirties vietą snapmirror.conf failą. Jei nėra tokio įrašo, operacija atspausdina klaidos pranešimą ir nutraukia gyvenimą.
-K parinktis nustato didžiausią greitį, kuriuo duomenys yra perduodami per kilobaitais per sekundę tinklo. Ji naudojama droselio diską, CPU, tinklo naudojimo. Ši parinktis nustato tik didžiausią vertę perdavimo greičio, tai negarantuoja, kad perdavimas bus eiti, kad greitai. Jei ši alternatyva nėra nustatyti, Ātršuvējs perduoda duomenis pagal KBS, nustatant šio į snapmirror.conf failą santykių (žr. snapmirror.conf). Tačiau, jei ši parinktis nėra nustatyta ir nėra kbs šio snapmirror.conf failą santykių nustatymas, Ātršuvējs perduoda duomenis, taip pat greitai, kaip jis gali.
-C parinktis veikia tik, initialize į qtree. Naudodami šią parinktį, SnapMirror sukuria fotografiją, pavadintą create_dest_snap į paskirties vietą po inicijuoti sėkmingai baigė (taip, kad ji nekonkuruoja su visus vykdomus atnaujinimus). SnapMirror ar užrakinti ar ištrinti šią fotografiją. Create_dest_snap negali būti hourly.x, nightly.x, arba weekly.x, nes šie pavadinimai saugomos reguliariojo kadrų,.
-Ai variantas veikia tik, initialize į qtree. Ji paskiria fotografiją pavadinimu src_snap iš kurios SnapMirror perduoda qtree, vietoj šaltinio fotografiją sukurti ir perduoti iš naujo fotografiją qtree. Ši parinktis yra naudojama perduoti tam tikrą fotografiją turinį, pavyzdžiui, ji gali perduoti fotografiją, kuri buvo paimtas, o duomenų bazė buvo stabili, nuosekliai valstybės. SnapMirror ar ne užrakinti ar ištrinti src_snap. Src_snap negali būti hourly.x, nightly.x, weekly.x, snapshot_for_backup.x arba snapshot_for_volcopy.x,.
-, Galimybė sukelia komandą negrąžinti, kai pirminis perkėlimas prasideda. Vietoj to, jis lauks, kol perdavimas baigia (arba nepavyksta), tuo metu jis bus atspausdinti užbaigimo būseną ir tada grįžti.
atnaujinimas [-s šaltinis] [-k kilobaitų] [-src_snap] [-c create_dest_snap] [-w] paskirties
Asinchroniniam veidrodžių, atnaujinimas iš karto pradėjo nuo ištakų iki paskirties atnaujinti veidrodį su šaltinio turinį.
Sinchroninių veidrodžiai, fotografiją yra sukurta ant šaltinio apimties, kuri tampa matoma paskirties apimties klientams.
Atnaujinimas komanda turi būti išduotas į paskirties Filer.
-S parinktis nustato perdavimo šaltinį ir veikia taip pat atnaujinimo, nes jis už initialize.
-K parinktis nustato droselio, kilobaitais per sekundę, perdavimo, ir veikia taip pat atnaujinimo, nes jis už initialize.
The -c option only works for an update to a qtree. With this option SnapMirror creates a snapshot named create_dest_snap on the destination after the update completes (so that it does not compete with any ongoing updates). SnapMirror does not lock or delete this snapshot. create_dest_snap cannot be hourly.x, nightly.x, or weekly.x, because these names are reserved for scheduled snapshots.
The -s option only works for an update to a qtree. It designates a snapshot named src_snap from which SnapMirror transfers the qtree, instead of creating a source snapshot and transferring the qtree from the new snapshot. This option is used to transfer a specific snapshot's contents; for example, it can transfer a snapshot that was taken while a database was in a stable, consistent state. SnapMirror does not lock or delete the src_snap . src_snap cannot be hourly.x, nightly.x, weekly.x, snapshot_for_backup.x or snapshot_for_volcopy.x.
The -w option causes the command not to return once the incremental transfer starts. Instead, it will wait until the transfer completes (or fails), at which time it will print the completion status and then return.
quiesce destination
Allows in-progress transfers to destination to complete after which new transfers are not allowed to start. Synchronous mirrors will be taken out of synchronous mode. Any further requests to update this volume or qtree will fail until the snapmirror resume command is applied to it.
Ši komanda turi ypatingą reikšmę qtree paskirties. Qtree paskirties, kuris yra pakeistas SnapMirror perdavimo metu turės pakeisti esančias. Šie pakeitimai nebus eksportuojami NFS ar CIFS klientų. Tačiau, jei fotografiją yra imtasi per šį laiką, jame bus pateikta Perėjimas į qtree turinį. Kad qtree atneš quiesce Perėjimas valstybės arba apdailos arba atšaukti bet kokius pakeitimus perdavimas. Snapmirror statusas gali pranešti, ar qtree quiesced ar ne. Quiesce procesas gali užtrukti šiek tiek laiko užbaigti, o SnapMirror pakeitimus qtree turinio. Bet, nors qtree quiesced fotografiją bus tos, kuri atitinka turinį, NFS ir CIFS klientų eksportuotų qtree vaizdą.
atnaujinti paskirties
Santraukos perduoda paskirties vietą. Komanda snapmirror CV gali būti naudojamas arba nutraukti snapmirror quiesce pažangą arba atšaukti anksčiau užpildytą snapmirror quiesce,. Komanda atkuria paskirties valstybę nuo quiescing, arba quiesced kokia ji buvo prieš į quiesce operacija.
pertrauka [-f] paskirties
Breaks SnapMirror santykiai, tekinimo snapmirrored paskirties į normalaus skaityti / rašyti apimtį arba qtree. Ši komanda turi būti išduotas į paskirties Filer.
The -f option forces a snapmirror break between snaplocked volume relationship without prompting for conformation.
This command does not modify the snapmirror.conf file. Any scheduled transfers to a broken mirror will fail.
For volumes, this command has the same effect as the vol options snapmirrored off command, and will remove the snapmirrored option from a volume. The fs_size_fixed volume option will remain on; it must be manually removed from the volume to reclaim any disk space that SnapMirror may have truncated for replication. (See the Options section and vol for more information on these two volume options.)
A destination qtree must be quiesced before it can be broken.
resync [ -n ] [ -f ] [ -S source ] [ -k kilobytes ] [ -s src_snap ] [ -c create_dest_snap ] [ -w ] destination
Resynchronizes a broken-off destination to its former source, putting the destination in the snapmirrored state and making it ready for update transfers. The resync command must be issued on the destination filer.
The resync command can cause data loss on the destination. Because it is effectively making desti_ n ation a replica of the source, any edits made to the destination after the break will be undone.
Dėl anksčiau atspindi apimtis, resync komanda efektyviai atlieka SnapRestore (žr. tūrio) paskirties naujausios fotografiją, kuris yra bendras tiek šaltinio ir paskirties vietą. In most cases, this is the last snapshot transferred from the source to the destination, but it can be any snapshot which is on both the source and destination due to SnapMirror replication. If new data has been written to the destination since the newest common snapshot was created, that data will be lost during the resync operation.
For formerly mirrored qtrees, SnapMirror restores data to the file system from the latest SnapMirrorcreated snapshot on the destination volume. Unlike the volume case, it requires this last snapshot in order to perform a resync .
The resync command initiates an update transfer after the SnapRestore or qtree data restoration completes.
The -n option reports what execution of the resync command would do, but does not execute the command.
The -f option forces the operation to proceed without prompting for confirmation.
The -S option sets the source of the transfer, and works the same for resync as it does for initialize .
The -k option sets the throttle, in kilobytes per second, of the transfer, and works the same for resync as it does for initialize .
The -c option only works for a resync to a qtree. With this option SnapMirror creates a snapshot named create_dest_snap on the destination after the resync transfer completes (so that it does not compete with any ongoing updates). SnapMirror does not lock or delete this snapshot. create_dest_snap cannot be hourly.x, nightly.x, or weekly.x, because these names are reserved for scheduled snapshots.
The -s option only works for a resync to a qtree. It designates a snapshot named src_snap from which SnapMirror transfers the qtree, instead of creating a source snapshot and transferring the qtree from the new snapshot. This option is used to transfer a specific snapshot's contents; for example, it can transfer a snapshot that was taken while a database was in a stable, consistent state. SnapMirror does not lock or delete the src_snap . src_snap cannot be hourly.x, nightly.x, weekly.x, snapshot_for_backup.x or snapshot_for_volcopy.x.
The -w option causes the command not to return once the resync transfer starts. Instead, it will wait until the transfer completes (or fails), at which time it will print the completion status and then return. This option has no effect if the -n option is also specified.
destinations [ -s ] [ source ]
Išvardyti visi šiuo metu žinomi paskirties šaltinių apie šio Failai. Apimtims, ši komanda taip pat išvardyti visus pakopomis miestai; tai yra kokių nors apimtys, kurios yra kopijos tiesioginių maršrutų. Ši komanda sąrašas jis žino apie visus tokius palikuonis.
-Ai variantas apima informacinio biuletenio šaltinio tūrio nepaskirstytojo kadrų, kiekvieną paskirties vietą, pavadinimus.
Jei šaltinis yra nurodyta, tik to tomo miestai bus rodomas. Šaltinis gali būti arba tūris pavadinimas, arba qtree kelias.
spaudai šaltinis {Ātršuvējs tūris | Ātršuvējs: qtree}
Pranešti SnapMirror, kad tam tikras tiesioginis veidrodis nebėra ketina prašyti naujinimų.
Jei tam tikras paskirties nebėra ketina prašyti naujinimų, jūs turi pasakyti SnapMirror, taip, kad ji nebegali išlaikyti tą paskirties vietą fotografiją. Ši komanda bus pašalinti vaizdus, kad yra nebereikalingi replikacijos į tą paskirties vietą, ir gali būti naudojami išvalyti SnapMirror sukurtus vaizdus, po snapmirror pertrauka išduodamas paskirties pusėje.
The source argument is the source volume or qtree that the destination is to be released from. The destination argument should be either the destination filer and destination volume name or the destination filer and destination qtree path. You can use a line from the output of the snapmirror destinations command as the set of arguments to this command.
store [ -g geometry ] destination tapedevices
Dumps an image of the destination volume to the tapedevices specified. This is much like the snapmirror initialize command, but from a source volume to a tape device. You can use the tapes and the retrieve command to perform the initial, priming transfer on any restricted volume.
Using the -g option on a snapmirror store will optimize the tape for a particular destination traditional volume. The geometry argument is a string which describes the geometry of the intended destination traditional volume. It can be acquired by using the snapmirror retrieve -g command on that traditional volume. Using this option can increase snapmirror retrieve performance dramatically. The -g option is only effective with traditional volumes.
Only volumes can be stored to or retrieved from tape. Qtrees cannot be stored to or retrieved from tape.
The tapedevices field of this command is a commaseparated list of valid tape devices. See tape for more information on tape device names.
Tape devices are not supported on vfilers. This command runs on the physical filer only.
retrieve { destination tapedevices | -h tapedevice | -g volume }
Restores the image on the tapedevices to the desti_ n ation specified. This is much like the snapmirror initialize command, but from a tape device to a destination volume. If destination is part of a SnapMirror relationship with the source volume from the store performed to create these tapes, the two volumes can be mirrored as if volume had been primed via an initial transfer over the network.
You can use the -h flag to read the header off of the single tapedevice specified. This will provide information on the tape source and index.
The -g option provides the volume geometry string for the specified volume . This string, when given to the snapmirror store -g command, will dramatically improve snapmirror retrieve performance to this volume .
The tapedevices field of this command is a commaseparated list of valid tape devices. See tape for more information on tape device names.
This feature only works for volumes. Qtrees cannot be stored to or retrieved from tape.
Tape devices are not supported on vfilers. This command runs on the physical filer only.
use destination tapedevices
Continues a tape transfer to destination with the specified tapedevices .
If a store or retrieve operation runs out of tape, it will prompt the user to provide another tape. After another tape has been provided, the use command is invoked to tell the SnapMirror process where to find it.
The destination field is specified by filer : volume in the case of retrieve , and filer : tapedevices in the case of store .
The tapedevices field of this command is a commaseparated list of valid tape devices. See tape for more information on tape device names.
Tape devices are not supported on vfilers. This command runs on the physical filer only.
throttle <n> destination
Modifies the throttle value for the snapmirror transfer to the destination with the specified value in kilobytes per second. This sets the maximum speed at which the data is trasfered over the network for the current transfer. A value of zero can be used to disable throttling.
The new value will be used only for the current transfer. The next scheduled transfer will use the kbs value specified in the snapmirror.conf file. If the value for the kbs option in the snapmirror.conf is changed while transfer is going on, then the new value will take effect within two minutes.
abort [ -h ] destination …
Aborts currently executing transfers to all specified destination s. It may take a few minutes for a transfer to clean up and abort. This does not stop new updates from starting. If you are interested in stopping further updates use the snapmirror quiesce command.
Any transfer with a restart checkpoint (you can view this via the snapmirror status command) may be restartable; to clear out the restart checkpoint and force any subsequent transfer to start with a fresh snapshot on the source, you can use abort -h on the destination. The -h option specifies that this is a hard abort; the restart checkpoint will be cleared out in addition to the transfer being stopped.
The abort command can be invoked from either the source or the destination filer. However, the -h option is only effective on the destination filer. The option will be ignored if specified on the source filer.
migrate [ -n ] [ -f ] [ -k kilobytes ] [ source_filer :] source_volume [ destination_filer :] desti t ion_volume
snapmirror migrate is run on the filer which holds the source volume. It must be run on two volumes which are already the source and destination of a SnapMirror pair.
snapmirror migrate will transfer data and NFS filehandles from the source_volume to the desti t ion_filer 's destination_volume (if no filer is specified, then migrate assumes the volume is local). If source_filer is specified, then the migrate destination will use that network interface to connect up to the source filer for the transfer of information.
The first thing migrate will do is check the source and destination sides for readiness. Then, it will stop NFS and CIFS service to the source. This will prevent changes to the source volume's data, which will make it appear to clients as though nothing has changed during the migration. It will run a regular SnapMirror transfer between the two volumes. At the end of the transfer, it will migrate the NFS filehandles, bring the source offline, and make the destination volume writable.
The -n flag will make a test run; that is, it will run all the pre-transfer checks, but stop short of transferring data. The -f flag will not prompt the user for confirmation. The -k flag will throttle the speed at which the transfer runs (at kilobytes kilobytes per second), in a manner similar to that used in the snapmirror update command.
If one filer in a cluster failover pair goes down, any active transfers are aborted. The SnapMirror scheduler and services will continue for volumes on the downed filer. The configurations of the SnapMirror relationships are taken from the downed filer's
snapmirror.access option or
snapmirror.allow and
snapmirror.conf files.
Here are a few examples of use of the
snapmirror command:
The following example turns the scheduler on and off:
toaster> snapmirror on toaster> snapmirror status Snapmirror is on. toaster> snapmirror off toaster> snapmirror status Snapmirror is off. toaster>
The following example presents the
snapmirror status with transfers running. Two are idle destinations (both from fridge); one of these has a restart checkpoint, and could be restarted if the setup of the two volumes has not changed since the checkpoint was made. The transfer from
vol1 to
arc2 has just started, and is in the initial stages of transferring. The transfer from toaster to icebox is partially completed; here, we can see the number of megabytes transferred.
toaster> snapmirror status Snapmirror is on. Source Destination State Lag Status fridge:home toaster:arc1 Snapmirrored 22:09:58 Idle toaster:vol1 toaster:arc2 Snapmirrored 01:02:53 Transferring toaster:vol2 icebox:saved Uninitialized – Transferring (128MB done) fridge:users toaster:arc3 Snapmirrored 10:14:36 Idle with restart checkpoint (12MB done) toaster>
The following example presents detailed status for one of the above snapmirror relationships specified as argument to the command. It displays extra information about base snapshot, transfer type, error message, and last transfer, etc.
toaster> snapmirror status -l arc1 Snapmirror is on. Source: fridge:home Destination: toaster:arc1 Type: Volume Status: Idle Progress: – State: Snapmirrored Lag: 22:09:58 Mirror Timestamp: Wed Aug 8 16:53:04 GMT 2001 Base Snapshot: toaster(0001234567)_arc1.1 Current Transfer Type: – Current Transfer Error: – Contents: Replica Last Transfer Type: Initialize Last Transfer Size: 1120000 KB Last Transfer Duration: 00:03:47 Last Transfer From: fridge:home
The following example shows how to get all the volumes and qtrees that are quiesced or quiescing on this filer with the status command.
filer> snapmirror status -q Snapmirror is on. vol1 has quiesced/quiescing qtrees: /vol/vol1/qt0 is quiesced /vol/vol1/qt1 is quiescing vol2 is quiescing
The following example starts writing an image of
vol1 on toaster to the tape on tape device
rst0a and continues with the tape on
rst1a . When the second tape is used up, the example shows how to resume the store using a new tape on
rst0a .
toaster> snapmirror store vol1 rst0a, rst1a snapmirror: Reference Snapshot: snapmirror_tape_5.17.100_21:47:28 toaster> SNAPMIRROR: store to toaster:rst0a, rst1a has run out of tape. toaster> snapmirror use toaster:rst0a, rst1a rst0a toaster> Wed May 17 23:36:31 GMT [worker_thread:notice]: snapmirror: Store from volume 'vol1′ to tape was successful (11 MB in 1:03 minutes, 3 tapes written).
The following example retrieves the header of the tape on tape device
rst0a . It then retrieves the image of
vol1 from the tape on tape device
rst0a .
toaster> snapmirror retrieve -h rst0a Tape Number: 1 WAFL Version: 12 BareMetal Version: 1 Source Filer: toaster Source Volume: vol0 Source Volume Capacity: 16MB Source Volume Used Size: 11MB Source Snapshot: snapmirror_tape_5.17.100_21:47:28 toaster> toaster> snapmirror retrieve vol8 rst0a SNAPMIRROR: retrieve from tape to toaster:vol8 has run out of tape. toaster> snapmirror use toaster:vol8 rst0a SNAPMIRROR: retrieve from tape to toaster:vol8 has run out of tape. toaster> snapmirror use toaster:vol8 rst0a toaster> snapmirror status Snapmirror is on. Source Destination State Lag Status toaster:rst1a, rst0a toaster:dst1 Unknown – Transferring (17MB done) toaster> Wed May 17 23:54:29 GMT [worker_thread:notice]: snapmirror: Retrieve from tape to volume 'vol8′ was successful (11 MB in 1:30 minutes).
The following example examines the status of all transfers, then aborts the transfers to
volm1 and
volm2 , and checks the status again. To clear the restart checkpoint,
snapmirror abort is invoked again.
toaster> snapmirror status Snapmirror is on. Source Destination State Lag Status fridge:home toaster:volm1 Uninitialized – Transferring (10GB done) fridge:mail toaster:volm2 Snapmirrored 01:00:31 Transferring (4423MB done) toaster> snapmirror abort toaster:volm1 volm2 toaster> snapmirror status Snapmirror is on. Source Destination State Lag Status fridge:home toaster:volm1 Snapmirrored 00:01:25 Idle fridge:mail toaster:volm2 Snapmirrored 01:03:11 Idle with restart checkpoint (7000MB done) toaster> snapmirror abort toaster:volm2 toaster> snapmirror status Snapmirror is on. Source Destination State Lag Status fridge:home toaster:volm1 Snapmirrored 00:02:35 Idle fridge:mail toaster:volm2 Snapmirrored 01:04:21 Idle
The following example examines the status of all transfers, then aborts the transfers to
volm1 and
volm2 with the
-h option and checks the status again. No restart checkpoint is saved.
toaster> snapmirror status Snapmirror is on. Source Destination State Lag Status fridge:home toaster:volm1 Uninitialized – Transferring (10GB done) fridge:mail toaster:volm2 Snapmirrored 01:00:31 Transferring (4423MB done) toaster> snapmirror abort -h toaster:volm1 toaster:volm2 toaster> snapmirror status Snapmirror is on. Source Destination State Lag Status fridge:home toaster:volm1 Snapmirrored 00:02:35 Idle fridge:mail toaster:volm2 Snapmirrored 01:04:21 Idle
Here is an example of the use of the
snapmirror migrate command:
toaster> snapmirror migrate home mirror negotiating with destination….
This SnapMirror migration will take local source volume home and complete a final transfer to destination toaster:mirror using the interface named toaster. After that, open NFS filehandles on the source will migrate to the destination and any NFS filehandles open on the destination will be made stale. Clients will only see the migrated NFS filehandles if the destination is reachable at the same IP addresss as the source. The migrate process will not take care of renaming or exporting the destination volume.
As a result of this process, the source volume home will be taken offline, and NFS service to this filer will be stopped during the transfer. CIFS service on the source volume will be terminated and CIFS will have to be set up on the destination.
Are you sure you want to do this? yes nfs turned off on source filer performing final transfer from toaster:home to mirror…. (monitor progress with “snapmirror status”) transfer from toaster:home to mirror successful starting nfs filehandle migration from home to mirror source volume home brought offline source nfs filehandles invalidated destination toaster:mirror confirms migration migration complete toaster> vol status Volume State Status Options root online normal root, raidsize=14 mirror online normal home offline normal toaster> vol rename home temp home renamed to temp you may need to update /etc/exports toaster> vol rename mirror home mirror renamed to home you may need to update /etc/exports toaster> exportfs -a
If a source volume is larger than the replica destination, the transfer is disallowed.
Notes on the snapmirror migrate command:
The migrate command is only a partial step of the process. It is intended to work when an administrator desires to move the data of one volume to another, possibly because they want to move to a new set of disks, or to a larger volume without adding disks.
We intend that migrate be run in as controlled an environment as possible. It is best if there are no dumps or SnapMirror transfers going on during the migration.
The clients may see stale filehandles or unresponsive NFS service while migrate is running. This is expected behavior. Once the destination volume is made writable, the clients will see the data as if nothing has happened.
migrate will not change exports or IP addresses; the new destination volume must be reachable in the same way as the source volume once was.
CIFS service will need to be restarted on the migrate destination.
Here are SnapMirror-related options (see options , protocolaccess , snapmirror , and snapmirror.allow for details on these options):
snapmirror.access
Controls SnapMirror access to a filer.
snapmirror.checkip.enable
Controls SnapMirror IP address checking using snapmirror.allow .
snapmirror.delayed_acks.enable
Controls a SnapMirror networking option.
replication.volume.transfer_limits
Controls increased stream counts. This option is provided to revert stream counts to legacy limits.
replication.volume.reserved_transfers
Guarantees that specified number of volume SnapMirror source/destination transfers always start. This option will reduce the maximum limit on all other transfers types and will be equivalent to maximum number of transfers possible.
snapmirror.enable
Turns SnapMirror on and off. SnapMirror can only be enabled on vfilers which are rooted on volumes.
snapmirror.log.enable
Turns SnapMirror logging on and off.
replication.volume.use_auto_resync
Turns auto resync functionality on and off for Synchronous SnapMirror relations. This option if enabled on Synchronous SnapMirror, destination will update from the source using the latest common base snapshot deleting all destination side snapshots newer than the common base snapshot.
Here are SnapMirror-related volume pseudo-options (see vol for more details):
snapmirrored
Designates that the volume is read-only.
fs_size_fixed
Effectively truncates the filesystem on the destination volume to the size of the source.
Options snapmirror.access , snapmirror.checkip.enable , and snapmirror.enable can be manipulated independently on a per-vfiler basis.
/etc/snapmirror.allow This file controls SnapMirror's access to a source filer. See snapmirror.allow , for details.
/etc/snapmirror.conf
This file controls SnapMirror schedules and relationships. See snapmirror.conf for details.
/etc/log/snapmirror
This file logs SnapMirror activity. See snapmirror for details.
aggr license options qtree vol tape(4) protocolaccess(8) snapmirror(5) snapmirror.allow(5) snapmirror.conf(5)
Table of Contents
Read more... (6038 words, estimated 24:09 mins reading time) Manual Pages man , manual , NetApp , ONTAP , SnapMirror
