Re: SSD caching an existing btrfs raid1

2017-09-21 Thread Psalle
On 20/09/17 22:45, Kai Krakow wrote: Am Wed, 20 Sep 2017 17:51:15 +0200 schrieb Psalle <psalleets...@gmail.com>: On 19/09/17 17:47, Austin S. Hemmelgarn wrote: (...) A better option if you can afford to remove a single device from that array temporarily is to use bcache.  Bcache h

Re: SSD caching an existing btrfs raid1

2017-09-20 Thread Psalle
On 19/09/17 17:47, Austin S. Hemmelgarn wrote: (...) A better option if you can afford to remove a single device from that array temporarily is to use bcache.  Bcache has one specific advantage in this case, multiple backend devices can share the same cache device. This means you don't

Deadlock while removing device, kernel 4.4.1

2016-02-16 Thread Psalle
This is a test system so I'm reporting in case this is unknown but no data at risk. This filesystem was created with a device (well, actually partition) /dev/sdb3, then /dev/sdc{2,3,4} were added, and finally I attempted to remove /dev/sdb3. No profiles were passed at any point. Briefly

Re: BTRFS RAM requirements, RAID 6 stability/write holes and expansion questions

2016-02-10 Thread Psalle
On 05/02/16 20:36, Mackenzie Meyer wrote: RAID 6 stability? I'll say more: currently, btrfs is in a state of flux where if you don't have a very recent kernel that's the first recommendation you're going to receive in case of problems. This means going out of stable packages in most distros.

Re: BTRFS RAM requirements, RAID 6 stability/write holes and expansion questions

2016-02-09 Thread Psalle
On 05/02/16 20:36, Mackenzie Meyer wrote: Hello, I've tried checking around on google but can't find information regarding the RAM requirements of BTRFS and most of the topics on stability seem quite old. To keep my answer short: every time I've tried (offline) deduplication or raid5 pools

Re: Purposely using btrfs RAID1 in degraded mode ?

2016-01-05 Thread Psalle
. -Psalle. On 04/01/16 18:00, Alphazo wrote: Hello, My picture library today lies on an external hard drive that I sync on a regular basis with a couple of servers and other external drives. I'm interested by the on-the-fly checksum brought by btrfs and would like to get your opinion

raid1 vs raid5

2016-01-05 Thread Psalle
d it isn't planned to be this way, AFAIK). I can foresee consistency difficulties, but that seems hardly insurmountable if its being done for raid1? Thanks in advance, Psalle. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to major