What about checkpoints on Celerra?

are these files take free space? or no?

in a separate area called savvol.They aren't saved in the production filesystem, if thats your concern.

I am don't understand. look:

i have filesystem - 600GB. used 85GB.

i create 5 checkpoints, but free space on my storage don't decreased.

they take savvvol space - a separate area reserved for checkpoints and dedupe data. they do take disk space.

When you create the FIRST checkpoint on the FS, then a savvol is created, and some space is reserved for the savvol.  If you use Celerra Replicatorv2, it creates hidden checkpoints, so the savvol would be created then.

When you create MORE checkpoints, it doesn't immediately consume more space.  The checkpoints themselves don't take up space.  However, as data on the filesystem changes, the changed blocks are copied to the savvol.  When a checkpoint is deleted or refreshed, then blocks are freed in the savvol.  Once the savvol fills, then it is extended, which will eat up more space from your storage pool.  Once the savvol is extended, it does not shrink.

You can see the current size of the savvol and how much free space is in it by running "nas_fs -size " from the CLI.  There is similar info available in the GUI.

It takes it from a storage pool ("free space").  If the savvol is ever deleted (which happens automatically as soon as all checkpoints are deleted), then the space is released back to the pool.

If you have multiple storage pools, by default it uses the storage pool that the filesystem was created from.  But when you create the first checkpoint you can also manually choose WHICH pool to pull disk space from.

and where it takes space for this savvol? on current filesystem, or on free space.

Tell me please, how do I calculate free space for checkpoints for all my filesystems?

expr `nas_fs -query:type==ckpt -format:"%s,%s\n" -Fields:BackupOf,sizevalues |sort -u -k 1,1|awk -F"," '{a +=$3};END{print a}'` / 1024

this will give you total free space in savvol for all file systems in gigabytes

Здравствуй, Dynamox. Эта команда позволит узнать сколько места мне потребуется для savvol для всех файловых систем?

Hi, Dynamox. Is this command give me size of savvol for all filesystem?

Pavel,

this command will give you the amount of free space in savvol for all file systems on Celerra. If you want to know the total size of savvol for all file systems you will need to change $3 to $2, if you want to know the size of used space in savvol ..change $3 to $4.

Павел. Если ты используеш $3 в етои комманде то она покажет сколко свободного места находитса в savvol во всех фаиловых системах на Celerra. Если ты хочет знать сколько у тебя вообше находитса места в savvol то просто поменяи $3 на $2. Вот ета команда возврашяет такие номера и потом я просто складываю определенную колонку.

nas_fs -query:type==ckpt -format:"%s,%s\n" -Fields:BackupOf,sizevalues

Пример:

fs05,390000,214500,175500,45,0
fs07,10000,6200,3800,38,0
fs09,450000,445500,4500,1,0
fs03,2530000,506000,2024000,80,0

Первая колонка ето название file system, вторая колонка ето обшии размер savvol, третяя колонка ето свободное место в savvol, четвертая колонка ето занятое место в savvol, пятая колонка ето сколько места занято в savvol в процентах ..а последняя колонка я без понятия.

Q: How much space checkpoints for all file systems take up ?

A: Each file system has its own savvol area where it keeps the changed blocks consumed by checkpoints.

я не знаю или я ответил на твои вопрос ?

yes. you answer.

thanks.

Подскажи, а как мне узнать сколько места займут чекпоинты всех файловых систем?

what is the command to check the status of the your checkpoints ?