similar to: Re: ceph on btrfs [was Re: ceph on non-btrfs file systems]

The big problem that I have with non-directio is that buffering delays program execution. When reading/writing files that are many times larger than RAM without directio, it is very apparent that system response drops through the floor- it can take several minutes for an ssh login to prompt for a password. This is true both for UFS and ZFS. Repeat the exercise with directio on UFS and there is no

I had to let this go and get on with testing DB2 on Solaris. I had to abandon zfs on local discs in x64 Solaris 10 5/08. The situation was that: * DB2 buffer pools occupied up to 90% of 32GB RAM on each host * DB2 cached the entire database in its buffer pools o having the file system repeat this was not helpful * running high-load DB2 tests for 2 weeks showed 100%

Hi. I just got a new Windows 7 Home Edition computer and am unable to mount its shares on my Linux system. I'm running Fedora 11, samba 3.4.7 I have no trouble mounting shares from XP systems on the network using the mount command below. I can access the Windows 7 share with no problems using smbclient on Linux. The Windows 7 share is accessible from the XP systems. Here is the mount

In order to get more information on IO performance problems I created the script below: #!/usr/sbin/dtrace -s #pragma D option flowindent syscall::*write*:entry /pid == $1 && guard++ == 0/ { self -> ts = timestamp; self->traceme = 1; printf("fd: %d", arg0); } fbt::: /self->traceme/ { /* elapsd =timestamp - self -> ts; printf("

On Sat, Aug 08, 2020 at 02:14:22AM +0300, Nir Soffer wrote: > On Fri, Aug 7, 2020 at 5:36 PM Richard W.M. Jones <rjones@redhat.com> wrote: > > > > On Fri, Aug 07, 2020 at 05:29:24PM +0300, Nir Soffer wrote: > > > On Fri, Aug 7, 2020 at 5:07 PM Richard W.M. Jones <rjones@redhat.com> wrote: > > > > These ones? > > > >

From: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> The pdflush thread is long gone, so this patch removes references to pdflush from btrfs comments. Cc: Chris Mason <chris.mason@fusionio.com> Cc: linux-btrfs@vger.kernel.org Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> --- I expect this patch to be merged via Al Viro''s VFS tree.

When sending a PUT request, the http header may be sent in the first packet when calling con.endheaders(). When we send the first chunk, the kernel may delay the send because the header packet was not acked yet. We have seen PUT requests delayed by 40 milliseconds on the server side during virt-v2v upload to ovirt. Here is example log from current RHEL virt-v2v version, uploading to RHV 4.2.3:

Does samba 3.0.23c not support the use of O_DIRECT? When I try to open an smbmount'd file using O_DIRECT, I get EINVAL. I am able to use O_DIRECT with no problems on a block device and nfs mounts, so I know the kernel supports it. samba: 3.0.23c kernel: 2.6.9-42.0.3.EL (32-bit) I am using the below code for my test. smb fails on open(2). #include <fcntl.h> #include

Hi samba experts, We have a strange file locking problem and i hope someone can help. We use some CentOS 5 servers, which use samba 3.0.33, to share files of a java application to clients. Clients are mostly CentOS 5 (same version as the server), but there are a few legacy windows clients (the reason why we use samba and not nfs). And now the problem. When our developer uploads a new jar file to

Was there some reason that patch got dropped? Otherwise rsync eats up all the buffer memory. Note -- I tried directio -- didn't work due to alignment issues -- buffers have to be aligned to sectors. The kernel, if I remember correctly, has been on again/off again on requiring alignment on directio -- because most of the drivers and devices do for directio to work, at. "dd"

The following script is used as a first attempt to discover IO patterns in a dbase setup: #------------------------------------------------------------------ #pragma D option dynvarsize=128m dtrace:::BEGIN { } pid$target::kaio:entry { self->doit = 1; } pid$target::_aiodone:return { self->doit = 0; } io:::start /self->doit || execname == "oracle"/ {

Currently I''m trying to figure out the best zfs layout for a thumper wrt. to read AND write performance. I did some simple mkfile 512G tests and found out, that per average ~ 500 MB/s seems to be the maximum on can reach (tried initial default setup, all 46 HDDs as R0, etc.). According to http://www.amd.com/us-en/assets/content_type/DownloadableAssets/ArchitectureWP_062806.pdf I would

This is my still-working-on-it code for btrfs directIO read. I''m posting it so people can see the progress being made on the project and can take an early shot at telling me this is just a bad idea and I''m crazy if they want to, or point out where I made some stupid mistake with btrfs core functions. The code is not complete and *NOT* ready for review or testing. I looked at

Commit-ID: 75895304280f597f46551deb8b87c27ac18a013c Gitweb: http://git.kernel.org/?p=libs/klibc/klibc.git;a=commit;h=75895304280f597f46551deb8b87c27ac18a013c Author: Helge Deller <deller at gmx.de> AuthorDate: Wed, 6 Jan 2016 00:43:50 +0000 Committer: H. Peter Anvin <hpa at linux.intel.com> CommitDate: Tue, 5 Jan 2016 17:45:50 -0800 [klibc] Add pread and pwrite 32bit syscall

Hi, I''m working on some performance analysis with our database and it seems that when the file system (UFS) is mounted with forcedirectio, the IO probe are not triggered when an I/O event occurs. Could you confirm that ? If so, why ? Seb -- This message posted from opensolaris.org

hi, i am trying to install oracle rac on fedora core 6 through iscsi. when i try to mount, mount.ocfs2: Invalid argument while mounting /dev/mapper/rac-crs on /mnt/crs. Check 'dmesg' for more information on this error. error log in dmesg, ocfs2: Unmounting device (253,11) on (node 255) (27354,0):ocfs2_parse_options:753 ERROR: Unrecognized mount option "datavolume" or missing

It is probably not strictly related to SAMBA itself but let me try to ask you for advice. Using smbmount I have mounted one of smb/cifs share to /root/test. This share has RW access and no authentication is required. Now, under DOSBox, whenever I try to mount /root/test I get this error (command sent under DOSBox: mount c /root/test). Directory /root/test doesn't exist. Any other directories,

Hi all, I am trying to configure a failover multipath between 2 GNBD devices. I have a 4 nodes Redhat Cluster Suite (RCS) cluster. 3 of them are used for running services, 1 of them for central storage. In the future I am going to introduce another machine for central storage. The 2 storage machine are going to share/export the same disk. The idea is not to have a single point of failure

Hello there, I am using a Gigabyte H55M-UD2H (Intel H55-Chipset) together with a Core-i5-650. According to Gigabyte Support the Mainboard does support VT-d. Well, actually support says, that VT-d does work on Windows-7 in XP-Mode. They do not test and support Linux though. Did anybody here have success using VT-d on any H55-Board? Perhaps it is some misconfiguration on my side. I tried a

I am still having this weird problem with nodes hanging while I'm running OCFS. I'm using OCFS 1.0.9-12 and RHAS 2.1 I've been working on tracking it down and here's what I've got so far: 1. I create a file from node 0. This succeeds; I can /bin/cat the file, append, edit, or whatever. 2. From node 1, I do an operation that accesses the DirNode (e.g. /bin/ls) 3. Node 0