similar to: HVM domain with write caching going on somewhere to disk

I've just implemented a generalization of R's text connections, to also support reading/writing raw binary data. There is very little new code to speak of. For input connections, I wrote code to populate the old text connection buffer from a raw vector, and provided a new raw_read() method. For output connections, I wrote a raw_write() to append to a raw vector. On input, the mode

When I install Windows Server 2003 Standard Edition on Xen, I didn''t configure multicore (vcpus = 1, cpus not set). Now I''d like to fully utilize multicore, but whatever I set, windows task manager can not see more than 1 cpu. Do I have to reinstall the OS with vcpus and cpus being set properly? Since the image file is licensed, is there any way I configure windows to show multi

From: Matt Fleming <matt.fleming at intel.com> Here are the patches that I've got queued up based on the very helpful feedback I received from people testing Syslinux 5.00-pre9. Unless anyone has any concerns these will make it into Syslinux 5.00-pre10. Matt Fleming (9): pxe: Don't call open_config() from the pxe core ldlinux: Print a warning if no config file is found

Hi, For each domUs there is unique shared memory(2-way circular queue) and event-channel(one shared memory and event-channel per domU) or there is only one shared memory and interdomain event-channel(for every DomU)? regards: Amit _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

Another question. When my database is running, I do [oracle@LNCSTRTLDB03 LPTE3]$ cp --o_direct xdb01.dbf /tmp cp: cannot open `xdb01.dbf' for reading: Permission denied [oracle@LNCSTRTLDB03 LPTE3]$ When the database is shudown it works. Is this normal for ocfs because with any other filesystem I can just copy a file at any time (Its only a testing, I know I cant copy datafiles and have

Hello everyone, I am learning and evaluating a glusterfs for film/video editing facilities. Some major film/video editing realtime applications are using the O_DIRECT file access for video/audio data files. The GLFS client via fuse mechanism is disallow the open file with O_DIRECT flag. I made a little sample code for read a file with O_DIRECT flag, and tried open the files on GLFS volumes. It

Hi everbody this is my first post, I have two test server .(Both of them is idle) db1 : RHEL4 OCFS2 db2 : RHEL3 OCFS I test the IO both of them The result is below. db1(Time Spend)db2(Time Spend)OS Test Command dd (1GB) (Yazma)0m0.796s0m18.420stime dd if=/dev/zero of=./sill.t bs=1M count=1000 dd (1GB) (Okuma)0m0.241s8m16.406stime dd of=/dev/zero if=./sill.t bs=1M count=1000 cp

Hi everbody this is my first post, I have two test server .(Both of them is idle) db1 : RHEL4 OCFS2 db2 : RHEL3 OCFS I test the IO both of them The result is below. db1(Time Spend)db2(Time Spend)OS Test Command dd (1GB) (Yazma)0m0.796s0m18.420stime dd if=/dev/zero of=./sill.t bs=1M count=1000 dd (1GB) (Okuma)0m0.241s8m16.406stime dd of=/dev/zero if=./sill.t bs=1M count=1000 cp

Hello, I installed the signed drivers from http://wiki.univention.de/index.php?title=Installing-signed-GPLPV-drivers and I ran into a BSOD on a Windows 2008 Server R2 Enterprise domU with a large number of vcpu''s. The BSOD is related to xennet.sys. After some trials I found that it runs fine up to 15 cores. From 16 or more, the BSOD kicks in when booting the domU. The hardware (4 times

Currently, default behavior of O_DIRECT writes was allowing concurrent writing among nodes, no cluster coherency guaranteed (no EX locks was taken), it hurts buffered reads on other nodes by reading stale data from cache. The new mount option introduce a chance to choose two different behaviors for O_DIRECT writes: * coherency=full, as the default value, will disallow concurrent

The company I work for is looking at vendors for a PBX, one of the requirements is VoIP. I have been sitting there listening to people pitch very proprietary implementations of VoIP where you are locked in to their hardware, their interface... I know a little bit about asterisk (set up a couple offices with it... run it at home...) and would like to pitch it to this company. Does someone have a

We're using RMAN to back up our 9.2 RAC database to an OCFS v1 volume. We have an existing shell script that we use for copying files from disk to tape via tar, one file at a time. (Don't ask why. It's a legacy script. Long story.) We're tweaking this script to use --o_direct when tarring the file to tape and that seems to be working fine: # tape device is /dev/nst0 $ tar

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 We currently use rsync for various jobs at our company. We are now looking at using it to create an offsite synchonised copy of an Oracle 10g RAC archive logs area. The source area is on Oracle OCFS filesystem. The OCFS filesystem requires all reads/writes to be performed with the O_DIRECT option, thus bypassing cache. Oracle provide an updated coreutils package which includes the

In config file, ''*type=ioemu*'' is added with vif . Does it make the difference if we don''t add. Because i did not notice any difference in para as well as full virtulization. Same as in case of exporting the disk to Guest dom. Is it just a placeholder or else ? Second thing, I am running RHEL3 as a HVM DomU on xen-3.0.4. Every thing works fine, but i had a problem to

On Fri, Aug 07, 2020 at 04:43:12PM +0300, Nir Soffer wrote: > On Fri, Aug 7, 2020, 16:16 Richard W.M. Jones <rjones@redhat.com> wrote: > > I'm not sure if or even how we could ever do a robust O_DIRECT > > > > We can let the plugin an filter deal with that. The simplest solution is to > drop it on the user and require aligned requests. I mean this is very error

Hi all, I am new to this LLVM. I went through the documenation of LLVM but I didn't find any support for Multicore. Is there any such possibility where multicore architecture can be exploited using LLVM. Thanks Vijay -------------- next part -------------- An HTML attachment was scrubbed... URL:

On 2019/3/14 ??6:42, Michael S. Tsirkin wrote: >>>>> Which means after we fix vhost to add the flush_dcache_page after >>>>> kunmap, Parisc will get a double hit (but it also means Parisc >>>>> was the only one of those archs needed explicit cache flushes, >>>>> where vhost worked correctly so far.. so it kinds of proofs your

On 2019/3/14 ??6:42, Michael S. Tsirkin wrote: >>>>> Which means after we fix vhost to add the flush_dcache_page after >>>>> kunmap, Parisc will get a double hit (but it also means Parisc >>>>> was the only one of those archs needed explicit cache flushes, >>>>> where vhost worked correctly so far.. so it kinds of proofs your

Given that the default journaling mode of ext3 (i.e. ordered), does not guarantee write ordering after a crash, is this journaling mode safe enough to use for a database such as Oracle? If so, how are out of sync writes delt with? Kind regards, Herta Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm