Re: [CentOS] Btrfs going forward, was: Errors on an SSD drive

2017-08-12 Thread Mike McCarthy, W1NR
> For SSDs all the sauce is in the firmware. If the model and firmware > were all the same, it is more likely to be a firmware bug than it is > to be a Btrfs bug. There are absolutely cases where Btrfs runs into > problems that other file systems don't, because Btrfs is designed to > detect them

Re: [CentOS] Btrfs going forward, was: Errors on an SSD drive

2017-08-11 Thread Chris Murphy
On Fri, Aug 11, 2017 at 12:12 PM, Warren Young wrote: > I rather doubt btrfs will be compiled out of the kernel in EL8, and even if > it is, it’ll probably be in the CentOSPlus kernels.

Re: [CentOS] Btrfs going forward, was: Errors on an SSD drive

2017-08-11 Thread Chris Murphy
On Fri, Aug 11, 2017 at 11:37 AM, hw wrote: > I want to know when a drive has failed. How can I monitor that? I´ve begun > to use btrfs only recently. Maybe checkout epylog and have it monitor for BTRFS messages. That's your earliest warning because Btrfs will complain with any

Re: [CentOS] Btrfs going forward, was: Errors on an SSD drive

2017-08-11 Thread Chris Murphy
On Fri, Aug 11, 2017 at 11:17 AM, Mark Haney wrote: > On Fri, Aug 11, 2017 at 1:00 PM, Chris Murphy > wrote: > >> Changing the subject since this is rather Btrfs specific now. >> >> >> >> >> >> >> Sounds like a hardware problem. Btrfs is

Re: [CentOS] Btrfs going forward, was: Errors on an SSD drive

2017-08-11 Thread Chris Adams
Once upon a time, hw said: > How do you install on an XFS that is adjusted to the stripe size and the > number of > units when using hardware RAID? I tried that, without success. You have to use a kickstart - that's always been the answer if you want to customize features of the

Re: [CentOS] Btrfs going forward, was: Errors on an SSD drive

2017-08-11 Thread Warren Young
On Aug 11, 2017, at 12:39 PM, hw wrote: > > Warren Young wrote: > >> [...] What do they suggest as a replacement? >> >> Stratis: https://stratis-storage.github.io/StratisSoftwareDesign.pdf > > Can I use that now? As I said, they’re targeting the first testable releases

Re: [CentOS] Btrfs going forward, was: Errors on an SSD drive

2017-08-11 Thread hw
Warren Young wrote: [...] What do they suggest as a replacement? Stratis: https://stratis-storage.github.io/StratisSoftwareDesign.pdf Can I use that now? The main downside to Stratis I see is that it looks like 1.0 is scheduled to coincide with RHEL 8, based on the release dates of

Re: [CentOS] Btrfs going forward, was: Errors on an SSD drive

2017-08-11 Thread Warren Young
On Aug 11, 2017, at 11:52 AM, hw wrote: > > Software RAID with mdadm is a bad idea because > it comes with quite some performance loss. That sounds like outdated information, from the time before CPUs were fast enough to do parity RAID calculations with insignificant overhead.

Re: [CentOS] Btrfs going forward, was: Errors on an SSD drive

2017-08-11 Thread Gordon Messmer
On 08/11/2017 10:52 AM, hw wrote: Software RAID with mdadm is a bad idea because it comes with quite some performance loss. That's not usually the case in my experience. Battery-backed write caches make benchmarks like bonnie++ look amazing, but in real workloads I typically see better

Re: [CentOS] Btrfs going forward, was: Errors on an SSD drive

2017-08-11 Thread Warren Young
On Aug 11, 2017, at 11:00 AM, Chris Murphy wrote: > > On Fri, Aug 11, 2017 at 5:41 AM, hw wrote: >> That´s one thing I´ve been wondering about: When using btrfs RAID, do you >> need to somehow monitor the disks to see if one has failed? > > Yes. > >

Re: [CentOS] Btrfs going forward, was: Errors on an SSD drive

2017-08-11 Thread hw
Mark Haney wrote: On Fri, Aug 11, 2017 at 1:00 PM, Chris Murphy wrote: Changing the subject since this is rather Btrfs specific now. Sounds like a hardware problem. Btrfs is explicitly optimized for SSD, the maintainers worked for FusionIO for several years of

Re: [CentOS] Btrfs going forward, was: Errors on an SSD drive

2017-08-11 Thread hw
Chris Murphy wrote: Changing the subject since this is rather Btrfs specific now. On Fri, Aug 11, 2017 at 5:41 AM, hw wrote: Chris Murphy wrote: On Wed, Aug 9, 2017, 11:55 AM Mark Haney wrote: To be honest, I'd not try a btrfs volume on a notebook

Re: [CentOS] Btrfs going forward, was: Errors on an SSD drive

2017-08-11 Thread Mark Haney
On Fri, Aug 11, 2017 at 1:00 PM, Chris Murphy wrote: > Changing the subject since this is rather Btrfs specific now. > > > > >> > >> Sounds like a hardware problem. Btrfs is explicitly optimized for SSD, > the > >> maintainers worked for FusionIO for several years of its

Re: [CentOS] Btrfs going forward, was: Errors on an SSD drive

2017-08-11 Thread Chris Murphy
Changing the subject since this is rather Btrfs specific now. On Fri, Aug 11, 2017 at 5:41 AM, hw wrote: > Chris Murphy wrote: >> >> On Wed, Aug 9, 2017, 11:55 AM Mark Haney wrote: >> >>> To be honest, I'd not try a btrfs volume on a notebook SSD. I did