From: Goffredo Baroncelli <kreijack@inwind.it>
To: Anand Jain <anand.jain@oracle.com>, linux-btrfs@vger.kernel.org
Subject: Re: [PATCH 00/15] btrfs: Hot spare and Auto replace
Date: Thu, 12 Nov 2015 20:21:25 +0100 [thread overview]
Message-ID: <5644E6B5.9070405@inwind.it> (raw)
In-Reply-To: <1447066589-3835-1-git-send-email-anand.jain@oracle.com>
On 2015-11-09 11:56, Anand Jain wrote:
> These set of patches provides btrfs hot spare and auto replace support
> for you review and comments.
Hi Anand,
is there any reason to put this kind of logic in the kernel space ? I think that it could be more simply to create a daemon which checks the disks and when needed it starts a replace...
The pool policy could be more sophisticated: some filesystem could require a "dedicated" pool (for example because the disks are in the same enclosure); in other case a global pool may be more useful.
Another feature of this daemon could be to add a disk when the disk space is too low, or to start a balance when there is no space to allocate further chunk.....
Of course all these logic could be implemented in kernel space, but I think that we should avoid that when possible. Moreover in user space the logging is more easy....
Only my 2¢...
BR
G.Baroncelli
[...]
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next prev parent reply other threads:[~2015-11-12 19:21 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-09 10:56 [PATCH 00/15] btrfs: Hot spare and Auto replace Anand Jain
2015-11-09 10:56 ` [PATCH 01/15] btrfs: Introduce a new function to check if all chunks a OK for degraded mount Anand Jain
2015-11-09 10:56 ` [PATCH 02/15] btrfs: Do per-chunk check for mount time check Anand Jain
2015-11-09 10:56 ` [PATCH 03/15] btrfs: Do per-chunk degraded check for remount Anand Jain
2015-11-09 10:56 ` [PATCH 04/15] btrfs: Allow barrier_all_devices to do per-chunk device check Anand Jain
2015-11-09 10:56 ` [PATCH 05/15] btrfs: optimize btrfs_check_degradable() for calls outside of barrier Anand Jain
2015-11-09 10:56 ` [PATCH 06/15] btrfs: Cleanup num_tolerated_disk_barrier_failures Anand Jain
2015-12-05 7:16 ` Qu Wenruo
2015-11-09 10:56 ` [PATCH 07/15] btrfs: introduce device dynamic state transition to offline or failed Anand Jain
2015-11-09 10:56 ` [PATCH 08/15] btrfs: check device for critical errors and mark failed Anand Jain
2015-11-09 10:56 ` [PATCH 09/15] btrfs: block incompatible optional features at scan Anand Jain
2015-11-09 10:56 ` [PATCH 10/15] btrfs: introduce BTRFS_FEATURE_INCOMPAT_SPARE_DEV Anand Jain
2015-11-09 10:56 ` [PATCH 11/15] btrfs: add check not to mount a spare device Anand Jain
2015-11-09 10:56 ` [PATCH 12/15] btrfs: support btrfs dev scan for " Anand Jain
2015-11-09 10:56 ` [PATCH 13/15] btrfs: provide framework to get and put a " Anand Jain
2015-11-09 10:56 ` [PATCH 14/15] btrfs: introduce helper functions to perform hot replace Anand Jain
2015-11-09 10:56 ` [PATCH 15/15] btrfs: check for failed device and " Anand Jain
2015-11-09 10:58 ` [PATCH 0/4] btrfs-progs: Hot spare and Auto replace Anand Jain
2015-11-09 10:58 ` [PATCH 1/4] btrfs-progs: Introduce BTRFS_FEATURE_INCOMPAT_SPARE_DEV SB flags Anand Jain
2015-11-09 10:58 ` [PATCH 2/4] btrfs-progs: Introduce btrfs spare subcommand Anand Jain
2015-11-09 10:58 ` [PATCH 3/4] btrfs-progs: add fi show for spare Anand Jain
2015-11-09 10:58 ` [PATCH 4/4] btrfs-progs: add global spare device list to filesystem show Anand Jain
2015-11-09 14:09 ` [PATCH 00/15] btrfs: Hot spare and Auto replace Austin S Hemmelgarn
2015-11-09 21:29 ` Duncan
2015-11-10 12:13 ` Austin S Hemmelgarn
2015-11-13 10:17 ` Anand Jain
2015-11-13 12:25 ` Austin S Hemmelgarn
2015-11-15 18:10 ` Christoph Anton Mitterer
2015-11-12 2:15 ` Qu Wenruo
2015-11-12 6:46 ` Duncan
2015-11-12 13:04 ` Austin S Hemmelgarn
2015-11-13 1:07 ` Qu Wenruo
2015-11-13 10:20 ` Anand Jain
2015-11-14 0:54 ` Qu Wenruo
2015-11-16 13:39 ` Austin S Hemmelgarn
2015-11-12 19:08 ` Goffredo Baroncelli
2015-11-13 10:18 ` Anand Jain
2015-11-12 19:21 ` Goffredo Baroncelli [this message]
2015-11-13 10:20 ` Anand Jain
2015-11-14 11:05 ` Goffredo Baroncelli
2015-11-16 13:41 ` Austin S Hemmelgarn
2015-11-16 22:07 ` Anand Jain
2015-11-17 12:28 ` Austin S Hemmelgarn
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