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Forum Discussion
ReadyNas 6.2 (NAS locks up entirely)
EDIT BY MODERATOR: Please see the post at the end of the thread: http://www.readynas.com/forum/viewtopic.php?p=456217#p456217 I guess i am not the only one this is happening to! everything worked ...
yajdam the post you quoted was for depasseg. I don't see an unusual amount of metadata in your logs.
This is what happens when a thread gets big like this. It becomes difficult to tell what is said for whom. Also users may believe they have the same problem as each other and in fact have quite different ones.
NFS should work well, but you do need to lower the thread count to 1 or 2 (under System > Settings > Services > NFS) and in some cases using async can be useful (but you do have to be careful about that: http://kb.netgear.com/app/answers/detail/a_id/14765/~/how-do-disable-nfs-sync-mode-in-readynas-os-6,-to-improve-nfs-performance)
For some use cases CoW and snapshots are not a good idea.
On the 100 series for new shares created on 6.2.x these are off by default.
Disabling them on existing shares will not have the same effect as once a file is created you can't change whether it has CoW or not.
CoW (Copy on Write) is one of the things that makes BTRFS a great filesystem however if you make a huge number of writes to modify existing files then you will get a lot of fragmentation. So you need to choose which shares you use it with and store your data accordingly.
On 6.2.x we link enabling/disabling CoW with enabling/disabling Bitrot protection.
This is what happens when a thread gets big like this. It becomes difficult to tell what is said for whom. Also users may believe they have the same problem as each other and in fact have quite different ones.
NFS should work well, but you do need to lower the thread count to 1 or 2 (under System > Settings > Services > NFS) and in some cases using async can be useful (but you do have to be careful about that: http://kb.netgear.com/app/answers/detail/a_id/14765/~/how-do-disable-nfs-sync-mode-in-readynas-os-6,-to-improve-nfs-performance)
For some use cases CoW and snapshots are not a good idea.
On the 100 series for new shares created on 6.2.x these are off by default.
Disabling them on existing shares will not have the same effect as once a file is created you can't change whether it has CoW or not.
CoW (Copy on Write) is one of the things that makes BTRFS a great filesystem however if you make a huge number of writes to modify existing files then you will get a lot of fragmentation. So you need to choose which shares you use it with and store your data accordingly.
On 6.2.x we link enabling/disabling CoW with enabling/disabling Bitrot protection.
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