similar to: balance disables nodatacow

I set the C (NOCOW) and z (Not_Compressed) flags on a folder but the extent counts of files contained there keep increasing. Said files are large and frequently modified but not changing in size. This does not happen when the filesystem is mounted with nodatacow. I''m using this as a workaround since subvolumes can''t be mounted with different options simultaneously. ie. one with

Hi. I have a volume group (let's say) vg_data. It consists from /dev/sdd5 sdd6 sdd7 I added sdc5 Now I want to remove (free) sdd7 and you is to for RAID partition. What are the commands (ordered) I need to perform? I failed to find clear howto. vg-data has only one partition, total size is over 1TB, free space is about 500GB so

> > > > > [root at darkness ~]# ls -al /dev/sr* > > ls: cannot access /dev/sr*: No such file or directory > > [root at darkness ~]# ls /dev/s* > > /dev/sda /dev/sda3 /dev/sdb1 /dev/sg0 /dev/stderr > > /dev/sda1 /dev/sda4 /dev/sdb2 /dev/sg1 /dev/stdin > > /dev/sda2 /dev/sdb /dev/sdb3 /dev/snapshot /dev/stdout > > [root at

Hello, I was wondering if anyone could point me in the right direction? I am receiving these in my log file and do not know what they mean or what to look for; Mar 8 04:03:56 bms kernel: ata3.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0 Mar 8 04:03:56 bms kernel: ata3.00: cmd 25/00:28:42:d3:37/00:00:13:00:00/e0 tag 0 cdb 0x0 data 20480 in Mar 8 04:03:56 bms kernel: res

On Mon, Jun 24, 2019 at 3:35 AM Pete Biggs <pete at biggs.org.uk> wrote: > On Sun, 2019-06-23 at 22:13 -0400, doug schmidt wrote: > > Hi, > > I'm having an issue with my Thinkpad P70 laptop/workstation. This system > is > > a dual boot, > > windows 10 pro and centos 7. I have not needed to use the cdrom until > now, > > however the system does not

Hi All. I have a server which uses RAID10 made of 4 partitions for / and boots from it. It looks like so: mdadm -D /dev/md1 /dev/md1: Version : 00.90 Creation Time : Mon Apr 27 09:25:05 2009 Raid Level : raid10 Array Size : 973827968 (928.71 GiB 997.20 GB) Used Dev Size : 486913984 (464.36 GiB 498.60 GB) Raid Devices : 4 Total Devices : 4 Preferred Minor : 1

Hi, If i set strict allocate = yes in samba to speed up the transfer of a mssql database dump, then btrfs does not compress the file. I have tried it also by just copying a small file in Windows to the samba share and the same. I have tried btrfs mount options autodefrag and then btrfs fi defrag -c and the file still does not get compressed. I have tried kernels 3.6.11, 3.8 and 3.10.7 on FC16

Ok, got a quickie. I have an eSATA drive, a 750GB Seagate in an eSATA external enclosure, and a Silicon Image sil3132 ExpressCard controller for my laptop. The disk and controller work great in CentOS 5 (or F7, for that matter), if I specifically mount it. This is not how I want to have to use this drive, however. I want to hotplug it; that is, plug the controller into the laptop, and then

Hello, some time ago we discussed on #btrfs that the nocow attribute for files wasn''t working (around 3.3 or 3.4 kernels). That was evident by files fragmenting even with the attribute set. Chris mentioned to find a fix quickly for that, and posted some lines of change into irc. But recently someone mentioned that 3.6-rc looks like still not respecting nocow for files. Is there really

Hi Seto, please could you update also the man page too ? Why it was not provided a way to clear a *single* flag ? To me it seems a bit too long to clear all the flag (btrfs mount-option clear) and then set the right one. As user interface I suggest something like chmod: btrfs mount-option set +ssd,skip_balance -nodatacow /dev/sdX or btrfs mount-option set =ssd,skip_balance,nodatacow

Greetings all, I see the following issue during snap creation under IO: Transaction commit calls btrfs_start_delalloc_inodes() that locks the delalloc_inodes list, fetches the first inode, unlocks the list, triggers btrfs_alloc_delalloc_work/btrfs_queue_worker for this inode and then locks the list again. Then it checks the head of the list again. In my case, this is always exactly the same

Hi, I am using 2.6.36.3 kernel with btrfs, 512MB memory and a very slow disk, no special options for mounting btrfs except noatime. Now I found it very slow. When I rm a 5GB movie, it took 20 secs. -- 竹密岂妨流水过 山高哪阻野云飞 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at

Hello, Trying to put together a list of TODO items for btrfs so we can update the wiki page fully. So far these things are on the list * Proper ENOSPC handling * O_DIRECT support (without checksumming) * AIO support * Subvolume quotas and inherited space usage information * Snapshot removal * QA Suite for automated regression testing * Reserved space for online fsck and the ability to add

On 02/02/2015 03:15 PM, Tim wrote: > What are you exactly searching for? Sounds like he is doing a network install, and is looking for the network path that must be supplied in order to do the install. If he doesn't have a local repository, then he has to supply the first part of the path (e.g. http://..../xyz/ ) and he has to stop at the directory level above .../7/ or some such. I

On my machine I have SATA0: HD SATA1: HD these two drives are set as RAID1 SATA2: HD extra SATA3: DVD SATA4: external USB disk Snip from dmesg shows the ATAPI device being detected. ata3: SATA max UDMA/133 cmd 0x9e0 ctl 0xbe0 bmdma 0xe400 irq 10 ata4: SATA max UDMA/133 cmd 0x960 ctl 0xb60 bmdma 0xe408 irq 10 ata3: SATA link up 1.5 Gbps (SStatus 113 SControl 300) ata3.00: ATAPI: PIONEER BD-ROM

Hello, This patch fixes the nodatacow check. The new test function can always detect extents referenced by multiple snatshots. If a extent was allocated in recent two transactions and no snapshot happened in these two transactions, we can always avoid cow. To check given extent''s reference, the test function walks down old tree root, then check backref info in the path. This initial

Hello, This is updated version of nodatacow patch. To check whether a given file extent is referenced by multiple snapshots, the checker walks down the fs tree through dead root and checks all tree blocks in the path. We can easily detect whether a given tree block is directly referenced by other snapshot. We can also detect any indirect reference from other snapshot by checking

To reproduce the bug: # mount -o nodatacow /dev/sda7 /mnt/ # dd if=/dev/zero of=/mnt/tmp bs=4K count=1 1+0 records in 1+0 records out 4096 bytes (4.1 kB) copied, 0.000136115 s, 30.1 MB/s # dd if=/dev/zero of=/mnt/tmp bs=4K count=1 conv=notrunc oflag=direct dd: writing `/mnt/tmp'': Input/output error 1+0 records in 0+0 records out btrfs_ordered_update_i_size() may return

I want to eliminate the COW feature on all of my OS files. It is a nice feature for user files, but I don''t see a clear benefit for the actual OS files. And I suspect that COW induced fragmentation is causing or aggravating problems with my system including the boot open_ctree problem. I had planned to recursively chattr these files to "nodatacow" status but then I ran

Hello, is it possible to set nodatacow on a per-file basis? I couldn''t find anything. If not, wouldn''t that be a great feature to get around the performance issues with VM and database storage? Of course cloning should still cause COW. Thanks, Ralf-Peter -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to