Re: Best Practice: Add new device to RAID1 pool (Summary)

2017-07-31 Thread Austin S. Hemmelgarn
On 2017-07-29 19:04, Cloud Admin wrote: Am Montag, den 24.07.2017, 18:40 +0200 schrieb Cloud Admin: Am Montag, den 24.07.2017, 10:25 -0400 schrieb Austin S. Hemmelgarn: On 2017-07-24 10:12, Cloud Admin wrote: Am Montag, den 24.07.2017, 09:46 -0400 schrieb Austin S. Hemmelgarn: On 2017-07-24

Re: Best Practice: Add new device to RAID1 pool (Summary)

2017-07-29 Thread Cloud Admin
Am Montag, den 24.07.2017, 18:40 +0200 schrieb Cloud Admin: > Am Montag, den 24.07.2017, 10:25 -0400 schrieb Austin S. Hemmelgarn: > > On 2017-07-24 10:12, Cloud Admin wrote: > > > Am Montag, den 24.07.2017, 09:46 -0400 schrieb Austin S. > > > Hemmelgarn: > > > > On 2017-07-24 07:27, Cloud Admin

Re: Best Practice: Add new device to RAID1 pool

2017-07-25 Thread Cloud Admin
Am Montag, den 24.07.2017, 20:42 + schrieb Hugo Mills: > On Mon, Jul 24, 2017 at 02:35:05PM -0600, Chris Murphy wrote: > > On Mon, Jul 24, 2017 at 5:27 AM, Cloud Admin > r.eu> wrote: > > > > > I am a little bit confused because the balance command is running > > >

Re: Best Practice: Add new device to RAID1 pool

2017-07-25 Thread Cloud Admin
Am Montag, den 24.07.2017, 23:12 +0200 schrieb waxhead: > > Chris Murphy wrote: > > This may be a stupid question , but are your pool of butter (or > BTRFS  > pool) by any chance hooked up via USB? If this is USB2.0 at No, it is a SATA array with (currently) four 8TB discs. -- To unsubscribe

Re: Best Practice: Add new device to RAID1 pool

2017-07-25 Thread Chris Murphy
On Mon, Jul 24, 2017 at 8:22 PM, Marat Khalili wrote: >>> This may be a stupid question , but are your pool of butter (or BTRFS pool) >>> by any chance hooked up via USB? If this is USB2.0 at 480mitb/s then it is >>> about 57MB/s / 4 drives = roughly 14.25 or about 11MB/s if you

Re: Best Practice: Add new device to RAID1 pool

2017-07-24 Thread Marat Khalili
>> This may be a stupid question , but are your pool of butter (or BTRFS pool) >> by any chance hooked up via USB? If this is USB2.0 at 480mitb/s then it is >> about 57MB/s / 4 drives = roughly 14.25 or about 11MB/s if you shave off >> some overhead. > >Nope, USB 3. Typically on scrubs I get

Re: Best Practice: Add new device to RAID1 pool

2017-07-24 Thread Chris Murphy
On Mon, Jul 24, 2017 at 3:17 PM, Adam Borowski wrote: > On Mon, Jul 24, 2017 at 02:55:00PM -0600, Chris Murphy wrote: >> Egads. >> >> Maybe Cloud Admin ought to consider using a filter to just balance the >> data chunks across the three devices, and just leave the metadata on

Re: Best Practice: Add new device to RAID1 pool

2017-07-24 Thread Chris Murphy
On Mon, Jul 24, 2017 at 3:12 PM, waxhead wrote: > > > Chris Murphy wrote: >> >> On Mon, Jul 24, 2017 at 5:27 AM, Cloud Admin >> wrote: >> >>> I am a little bit confused because the balance command is running since >>> 12 hours and only 3GB of

Re: Best Practice: Add new device to RAID1 pool

2017-07-24 Thread Adam Borowski
On Mon, Jul 24, 2017 at 02:55:00PM -0600, Chris Murphy wrote: > Egads. > > Maybe Cloud Admin ought to consider using a filter to just balance the > data chunks across the three devices, and just leave the metadata on > the original two disks? Balancing when adding a new disk isn't that important

Re: Best Practice: Add new device to RAID1 pool

2017-07-24 Thread waxhead
Chris Murphy wrote: On Mon, Jul 24, 2017 at 5:27 AM, Cloud Admin wrote: I am a little bit confused because the balance command is running since 12 hours and only 3GB of data are touched. That's incredibly slow. Something isn't right. Using btrfs-debug -b from

Re: Best Practice: Add new device to RAID1 pool

2017-07-24 Thread Hugo Mills
On Mon, Jul 24, 2017 at 02:55:00PM -0600, Chris Murphy wrote: > On Mon, Jul 24, 2017 at 2:42 PM, Hugo Mills wrote: > > > > >In my experience, it's pretty consistent at about a minute per 1 > > GiB for data on rotational drives on RAID-1. For metadata, it can go > > up to

Re: Best Practice: Add new device to RAID1 pool

2017-07-24 Thread Chris Murphy
On Mon, Jul 24, 2017 at 2:42 PM, Hugo Mills wrote: > >In my experience, it's pretty consistent at about a minute per 1 > GiB for data on rotational drives on RAID-1. For metadata, it can go > up to several hours (or more) per 256 MiB chunk, depending on what > kind of

Re: Best Practice: Add new device to RAID1 pool

2017-07-24 Thread Hugo Mills
On Mon, Jul 24, 2017 at 02:35:05PM -0600, Chris Murphy wrote: > On Mon, Jul 24, 2017 at 5:27 AM, Cloud Admin > wrote: > > > I am a little bit confused because the balance command is running since > > 12 hours and only 3GB of data are touched. > > That's incredibly

Re: Best Practice: Add new device to RAID1 pool

2017-07-24 Thread Chris Murphy
On Mon, Jul 24, 2017 at 5:27 AM, Cloud Admin wrote: > I am a little bit confused because the balance command is running since > 12 hours and only 3GB of data are touched. That's incredibly slow. Something isn't right. Using btrfs-debug -b from btrfs-progs, I've

Re: Best Practice: Add new device to RAID1 pool

2017-07-24 Thread Cloud Admin
Am Montag, den 24.07.2017, 10:25 -0400 schrieb Austin S. Hemmelgarn: > On 2017-07-24 10:12, Cloud Admin wrote: > > Am Montag, den 24.07.2017, 09:46 -0400 schrieb Austin S. > > Hemmelgarn: > > > On 2017-07-24 07:27, Cloud Admin wrote: > > > > Hi, > > > > I have a multi-device pool (three discs) as

Re: Best Practice: Add new device to RAID1 pool

2017-07-24 Thread Cloud Admin
Am Montag, den 24.07.2017, 19:08 +0500 schrieb Roman Mamedov: > On Mon, 24 Jul 2017 09:46:34 -0400 > "Austin S. Hemmelgarn" wrote: > > > > I am a little bit confused because the balance command is running > > > since > > > 12 hours and only 3GB of data are touched. This

Re: Best Practice: Add new device to RAID1 pool

2017-07-24 Thread Austin S. Hemmelgarn
On 2017-07-24 10:12, Cloud Admin wrote: Am Montag, den 24.07.2017, 09:46 -0400 schrieb Austin S. Hemmelgarn: On 2017-07-24 07:27, Cloud Admin wrote: Hi, I have a multi-device pool (three discs) as RAID1. Now I want to add a new disc to increase the pool. I followed the description on https:

Re: Best Practice: Add new device to RAID1 pool

2017-07-24 Thread Cloud Admin
Am Montag, den 24.07.2017, 09:46 -0400 schrieb Austin S. Hemmelgarn: > On 2017-07-24 07:27, Cloud Admin wrote: > > Hi, > > I have a multi-device pool (three discs) as RAID1. Now I want to > > add a > > new disc to increase the pool. I followed the description on https: > > //bt > >

Re: Best Practice: Add new device to RAID1 pool

2017-07-24 Thread Roman Mamedov
On Mon, 24 Jul 2017 09:46:34 -0400 "Austin S. Hemmelgarn" wrote: > > I am a little bit confused because the balance command is running since > > 12 hours and only 3GB of data are touched. This would mean the whole > > balance process (new disc has 8TB) would run a long,

Re: Best Practice: Add new device to RAID1 pool

2017-07-24 Thread Austin S. Hemmelgarn
On 2017-07-24 07:27, Cloud Admin wrote: Hi, I have a multi-device pool (three discs) as RAID1. Now I want to add a new disc to increase the pool. I followed the description on https://bt rfs.wiki.kernel.org/index.php/Using_Btrfs_with_Multiple_Devices and used 'btrfs add '. After that I called a

Best Practice: Add new device to RAID1 pool

2017-07-24 Thread Cloud Admin
Hi, I have a multi-device pool (three discs) as RAID1. Now I want to add a new disc to increase the pool. I followed the description on https://bt rfs.wiki.kernel.org/index.php/Using_Btrfs_with_Multiple_Devices and used 'btrfs add '. After that I called a balance for rebalancing the RAID1 using