Re: High CPU usage of RT threads...

Thank you for the analysis, Nikolay. Will try to upgrade the kernel and check if the issue reproduces. Regards, Shyam On Mon, Mar 19, 2018 at 5:21 PM, Nikolay Borisov <nbori...@suse.com> wrote: > > > On 19.03.2018 13:48, Shyam Prasad N wrote: >> On Mon, Mar 19, 2018 at 4:3

Re: High CPU usage of RT threads...

On Mon, Mar 19, 2018 at 4:37 PM, Nikolay Borisov <nbori...@suse.com> wrote: > > > On 19.03.2018 13:02, Shyam Prasad N wrote: >> Hi, >> >> Attaching the sysrq-trigger output. > > Has this been obtained while the machine experienced a period of a lot > of

Re: High CPU usage of RT threads...

Hi, Attaching the sysrq-trigger output. Regards, Shyam On Mon, Mar 19, 2018 at 12:45 PM, Nikolay Borisov <nbori...@suse.com> wrote: > > > On 19.03.2018 09:13, Shyam Prasad N wrote: >> Hi Nikolay, >> >> Thanks for your reply on this. >> >> Checked

Re: High CPU usage of RT threads...

if there is anything else you can think of, based on the above data. Regards, Shyam On Thu, Mar 15, 2018 at 12:59 PM, Nikolay Borisov <nbori...@suse.com> wrote: > > > On 15.03.2018 09:23, Shyam Prasad N wrote: >> Hi, >> >> Our servers run some daemons that are scheduled

High CPU usage of RT threads...

Hi, Our servers run some daemons that are scheduled to run many real time threads. These threads serve the client nodes by performing I/O on top of some set of disks, configured as DRBD pairs with disks on other peer servers for high availability of data. Btrfs is the filesystem that is

Re: Btrfs occupies more space than du reports...

e not reported any errors. Regards, Shyam On Fri, Feb 23, 2018 at 6:53 PM, Austin S. Hemmelgarn <ahferro...@gmail.com> wrote: > On 2018-02-23 06:21, Shyam Prasad N wrote: >> >> Hi, >> >> Can someone explain me why there is a difference in the number of &g

Btrfs occupies more space than du reports...

Hi, Can someone explain me why there is a difference in the number of blocks reported by df and du commands below? = # df -h /dc Filesystem Size Used Avail Use% Mounted on /dev/drbd1 746G 519G 225G 70% /dc # btrfs filesystem df -h /dc/ Data, single:

Re: Power down tests...

have near-ext4-like behaviour with this, w.r.t power off recovery. Regards, Shyam On Mon, Aug 7, 2017 at 7:52 AM, Chris Murphy <li...@colorremedies.com> wrote: > On Thu, Aug 3, 2017 at 11:51 PM, Shyam Prasad N <nspmangal...@gmail.com> > wrote: >> Hi all, >> >> W

Re: Power down tests...

Hi Chris, Thanks for the detailed reply. :) Read my answers inline: On Mon, Aug 7, 2017 at 7:45 AM, Chris Murphy wrote: > > This is astronomically more complicated than the already complicated > scenario with one file system on a single normal partition of a well >

Re: Power down tests...

mfl...@demfloro.ru> wrote: > On Fri, 4 Aug 2017 13:19:39 +0530 > Shyam Prasad N <nspmangal...@gmail.com> wrote: > >> Oh ok. I read this in the man page and assumed that it's on by >> default: flushoncommit, noflushoncommit >>(default: on) >> >

Re: Power down tests...

this needs a correction? On Fri, Aug 4, 2017 at 12:52 PM, Adam Borowski <kilob...@angband.pl> wrote: > On Fri, Aug 04, 2017 at 12:15:12PM +0530, Shyam Prasad N wrote: >> Is flushoncommit not a default option on version >> 4.4? Do I need specifically set this option? >

Power down tests...

Hi all, We're running a couple of experiments on our servers with btrfs (kernel version 4.4). And we're running some abrupt power-off tests for a couple of scenarios: 1. We have a filesystem on top of two different btrfs filesystems (distributed across N disks). i.e. Our filesystem lays out data

Stability status of btrfs-convert...

Hi, I'm planning to use the btrfs-convert tool to convert production data in ext4 filesystem into btrfs. What is the stability status of this feature? As per the below link, this tool is not in frequent use in latest linux kernels. https://btrfs.wiki.kernel.org/index.php/Conversion_from_Ext3

Ded

Hi, This email is actually several questions clubbed as one... I have a btrfs filesystem mounted at /btrfs_vol/ Every N minutes, I run bedup for deduplication of data in /btrfs_vol Inside /btrfs_vol, I have several subvolumes (consider this as home directories of several users) I have set

Re: hard links

On 04/04/2012 10:08 PM, Arnd Hannemann wrote: Hi, today I experimented with hard links on btrfs and by this used all available inode space of a file. Interestingly if this happens even a rename of such an filename to an _equal length_ filename fails: arnd@kallisto:/mnt/btrfs/tmp$ mv a b mv:

Re: support for Oracle db consistent backups with btrfs snapshoting?

On 02/20/2012 07:49 PM, Andrew Henry wrote: Will there be support for consistent backups á la NetApp when using snapshots on btrfs filesystems that contain Oracle databases? Im not that familiar with NetApp, and don't know whether there needs to be extra support for the Oracle bits for their

Re: Extreme slowdown

On 12/16/2011 09:14 AM, Chester wrote: On Thu, Dec 15, 2011 at 8:19 PM, Fajar A. Nugrahal...@fajar.net wrote: On Fri, Dec 16, 2011 at 1:49 AM, Tobiastra...@robotech.de wrote: Hi all! My BTRFS-FS ist getting really slow. Reading is ok, writing is slow and deleting is horrible slow. There