similar to: "no space left on device" related to directory limit

Hello, I have found, that ocfs2 is very slow when doing I/O operation without cache. See a simple test: ng-vvv1:~# dd if=/data/verejna/dd-1G bs=1k | dd of=/dev/null 1048576+0 records in 1048576+0 records out 1073741824 bytes (1.1 GB) copied, 395.183 s, 2.7 MB/s 2097152+0 records in 2097152+0 records out 1073741824 bytes (1.1 GB) copied, 395.184 s, 2.7 MB/s The underlying block device is quite

Hi everyone Firstly, apologies for the cross post, I am not sure which list is most appropriate for this question. I should also point out, that I did not install OCFS2 and I am not the person that normally looks after these kind of things, so please can you bear that in mind when you make any suggestions (I will need a lot of detail!) The problem: accessing certain directories within the

Hi everyone Firstly, apologies for the cross post, I am not sure which list is most appropriate for this question. I should also point out, that I did not install OCFS2 and I am not the person that normally looks after these kind of things, so please can you bear that in mind when you make any suggestions (I will need a lot of detail!) The problem: accessing certain directories within the

This is related to the "No space on OCFS2 volume" error discussed here this past Sep/Oct. Our Oracle support rep pointed us to Metalink note #1232702.1 and suggested we should script something up to periodically check the free contiguous blocks in the group chains for the volume in question. Reading the note, I get how to get Clusters per Group X Bits per Cluster from the "stat

We are setting up 2 new EL5 U4 machines to replace our current database servers running our demo environment. We use 3Par SANs and their snap clone options. The current production system we snap clone from is EL4 U5 with ocfs2 1.2.9, the new servers have ocfs2 1.4.3 installed. Part of the refresh process is to run fsck.ocfs2 on the volume to recover, but right now as I am trying to run it on our

Hello. I plan to use OCFS2 + DRBD for email server. Problem: I use "seeker" for testing http://www.linuxinsight.com/how_fast_is_your_disk.html And get this: Results: 65 seeks/second, 15.23 ms random access time Then I do rm of many files - it fals to 10 seeks/second and performance is terrible. What can I do to increase it? What`s wrong? Below is many info. What we have: Debian

Hello, I'm writing from the otherside of the world from where my systems are, so details are coming in slow. We have a 6TB OCFS2 volume across 20 or so nodes all running OEL5.4 running ocfs2-1.4.4. The system has worked fairly well for the last 6-8 months. Something has happened over the last few weeks which has driven write performance nearly to a halt. I'm not sure how to proceed, and

Hi all, I stumbled over a curious thing. The Linux tools "df" and "du" aren't working correctly on an OCFS2 filesystem. "df" shows approx. twice the size as there is on the volume. Here how I found out about this issue: - same dir(a few files more in OCFS but the files are ca. 12 kB in size), first on XFS second on the OCFS volume # du -ms

Hi there I recently installed an OCFS2 filesystem on our FC-SAN. Everything seemed to work fine and I could read & write the filesystem from both servers that are mounting it. After a while though, writes coming from one node do not appear on the other node and vice versa. I am not sure what's causing this, and not very experienced at debugging filesystems. If anybody has any

On Sat, Feb 28, 2009 at 18:13:12 PST 2009, Joel Becker wrote: > On Sat, Feb 28, 2009 at 12:09:37PM +0000, Nuno Fernandes wrote: > > > That's rather odd. What is the blocksize and cluster size of > > > this filesystem? Can you send me the output of 'debugfs.ocfs2 -R "stat > > > /.zbr" /dev/hda3'? > > > > > > Joel > >

Another simple question. How do I calculate the size of the volume from the superblock? Do I just use the two fields: u_int32_t s_blocksize_bits; /* Blocksize for this fs */ u_int32_t s_clustersize_bits; /* Clustersize for this fs */ What is the formula to use? Thanks, John

I have a 12 node cluster using ocfs2. Not all the nodes mount the same filesystems, so for this issue I am just focusing on the 8 nodes that mount the filesystem that has performance issues. The 8 nodes have 10 ocfs2 volumes mounted on them, and the volume that seems to be causing the most problems is 2TB (data), which is currently 90% full. At times, data performs very poorly. Processes

Hi, We are trying to use OCFS2 as VM storage. After running into problems with qemu's disk_mirror feature we now think there could be a problem with the FIEMAP ioctl in OCFS2. As far as I understand the situation looks like this: Qemu inquiries the FS if the given section of the image is already allocated via the FIEMAP ioctl [1] It especially checks if fm_mapped_extents is greater 0.

In ocfs2_add_branch, we use the rightmost rec of the leaf extent block to generate the e_cpos for the new added branch. In the most case, it is OK but if there is a gap between the the root(or branch) 's rightmost rec and the leaf, it will cause kernel panic if we insert some clusters in it. The message is something like: (7445,1):ocfs2_insert_at_leaf:3775 ERROR: bug expression:

Hi Mark/Joel, This is the v2 of bug fix for ocfs2_add_branch. Modification from V1 to V2: 1. Create a patch which return EROFS instead of BUG in ocfs2_insert_at_leaf. 2. Use ocfs2_adjust_rightmost_records to change the root and extent blocks in the rightmost path. Regards, Tao

Hi! When i'm running debugfs.ocfs2 i get the following result: debugfs.ocfs2 -R "stats" /dev/sdb Revision: 0.90 Mount Count: 0 Max Mount Count: 20 State: 0 Errors: 0 Check Interval: 0 Last Check: Mon May 10 12:17:37 2010 Creator OS: 0 Feature Compat: 3 backup-super strict-journal-super Feature Incompat: 8016 sparse

Hi Mark/Joel, I meet with some meta allocation bugs when I implement reflink these days. And after some investigation, I think we should have the same problem when we have PAGE_SIZE > CLUSTER_SIZE. So I create a scenario today in one ppc box and try. the box panic as I expected. ;) The scenario is that: Create a file with the disk layout like this(with bs=512, and cs=4K). debugfs: stat

Hi Mark/Joel, These are 2 bug fix for b-tree. Please review. I have sent out the first one last week, but it was based on cacheme. So resend it. Now it bases on joel's fixes branch. The second one is another b-tree rotation bug. I guess the reason why we never meet with it is that no one has ever used b-tree like reflink before. ;) Regards, Tao

Hi all, I have 6 datasets(dataframes Assem_ContigsLen7 through all_ContigsLen12) containing 3 columns (contig_id, contig_length, read_count). Each dataset is composed of 3 types of contigs (assemblies of genomic fragments), 1- all Bacterial fragments, 2 - all Viral fragments, 3 - mixed fragments. I identified the type of contig through a merge with another table with just contig_id and

To whomever reads this, This post I accidentally sent to david himself, I am now sending it to the group. It will be out of order, and includes the strace. Regards Brian My apologies for any inconvenience. -------------- Hi David, Thanks for your response. The Error message is for e.g.: Cannot write file attributes of "\\MYHOST\backup\sparse\My Family Tree 6.0.zip.ffs_tmp".