Linux NILFS file system: automatic continuous snapshots
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Re: Linux NILFS file system: automatic continuous snapshots
#2Very nice introduction to NILSFS, which has been in the Linux kernel since 2009.
Re: Linux NILFS file system: automatic continuous snapshots
#3No post body was provided.
Re: Linux NILFS file system: automatic continuous snapshots
#4How does this compare to ZFS + cron to create snapshots every X minutes?
Re: Linux NILFS file system: automatic continuous snapshots
#5How does this compare to ZFS + cron to create snapshots every X minutes?
There is no comparison. NILFS provides *continuous* snaphots, so you can inspect and rollback changes as needed.
It does without a performance penalty compared to other logging filesystems.
And without using additional space forever. The backlog rotates forward continuously.
It's a really unique feature that makes a lot of sense for desktop use, where you might want to recover files that were created and deleted after a short time.
Re: Linux NILFS file system: automatic continuous snapshots
#6How does this compare to ZFS + cron to create snapshots every X minutes?
There is no comparison. NILFS provides *continuous* snaphots, so you can inspect and rollback changes as needed. It does without a performance penalty compared to other logging filesystems. And without using additional space forever. The backlog rotates forward continuously. It's a really unique feature that makes a lot of sense for desktop use, where you might want to recover files that were created and deleted afte…
"It does without a performance penalty"
yeah. it's already so terribly slow that it's unlikely that taking snapshots can make it any slower :-D
Re: Linux NILFS file system: automatic continuous snapshots
#7How close is this to a large continuous tape loop for video surveillance?
I would very much welcome a filesystem that breaks away from the directories/files paradigm. Any time-based data store would greatly benefit from that.
Re: Linux NILFS file system: automatic continuous snapshots
#8How does this compare to ZFS + cron to create snapshots every X minutes?
There is no comparison. NILFS provides *continuous* snaphots, so you can inspect and rollback changes as needed. It does without a performance penalty compared to other logging filesystems. And without using additional space forever. The backlog rotates forward continuously. It's a really unique feature that makes a lot of sense for desktop use, where you might want to recover files that were created and deleted afte…
> It does without a performance penalty.
What is the basis for comparison? Sounds like a pretty meaningless statement at its face.
Re: Linux NILFS file system: automatic continuous snapshots
#9How does this compare to ZFS + cron to create snapshots every X minutes?
There is no comparison. NILFS provides *continuous* snaphots, so you can inspect and rollback changes as needed. It does without a performance penalty compared to other logging filesystems. And without using additional space forever. The backlog rotates forward continuously. It's a really unique feature that makes a lot of sense for desktop use, where you might want to recover files that were created and deleted afte…
>It's a really unique feature that makes a lot of sense for desktop us
Sounds like it could serve as a basis for a Linux implementation of something like Apple Time Machine.
Re: Linux NILFS file system: automatic continuous snapshots
#10How close is this to a large continuous tape loop for video surveillance? I would very much welcome a filesystem that breaks away from the directories/files paradigm. Any time-based data store would greatly benefit from that.
I think all you would need to add is a daemon that automatically deletes the oldest file(s) whenever free space drops below a certain threshold, so that the filesystem GC can reclaim that space for new files.