similar to: ZFS unit of compression

Hi There, I''ve been trying to get this to work for the last couple of days, but found no information on the internet that would help. Essentially, a tap-ctl opencommand with a qcow2 image does not work (error code 2) and produces the following line in syslog: tap-ctl: tap-err:tap_ctl_open: open failed, err -2 I have attached a shell script that reproduces the problem on my machine. The

Hi, I''d like to use the blktap utils from https://github.com/xen-org/blktap because of the mirror feature, as the blktap utils comming with xen does not support this. Could anybody explain why there are two different blktap utils (one in git and one comming with xen source) and how to compile the one from git so that it works with libxl ? Any pointers greatly appreciated ;-) Thanks

I'm trying to debug what I believe to be a kernel bug (https://lists.centos.org/pipermail/centos-devel/2016-March/014463.html) and I'm trying to set up systemtap for that. I'm trying to set up systemtap on kernel 3.18.21-17.el6.x86_64 (Xen 4.4.3-10.el6) and it requires the kernel-debuginfo package, however I cannot find anywhere package kernel-debuginfo-3.18.21-17.el6.x86_64.rpm. In

This patch series introduces the tapback daemon, the user space daemon that acts as a device''s back-end, essentially most of blkback in user space. The daemon is responsible for coordinating the front-end and tapdisk. It creates tapdisk process as needed, instructs them to connect to/disconnect from the shared ring, and manages the state of the back-end. The shared ring between the

On 7 March 2016 at 14:42, Johnny Hughes <johnny at centos.org> wrote: > On 03/03/2016 01:22 PM, Thanos Makatos wrote: >> I'm trying to debug what I believe to be a kernel bug >> (https://lists.centos.org/pipermail/centos-devel/2016-March/014463.html) >> and I'm trying to set up systemtap for that. >> >> I'm trying to set up systemtap on kernel

This patch series copies the core of the tapdisk process from blktap2, with updates coming from blktap2.5. Signed-off-by: Thanos Makatos <thanos.makatos@citrix.com>

Hi, I''m trying to boot a PV VM I just installed (following http://wiki.xen.org/wiki/Debian_Guest_Installation_Using_Debian_Installer) without success. My XEN installation is xen-unstable 54c8c9eaee92+ on a Debian unstable machine (x86_64), kernel 3.3.4+. The VM I installed is, again, a Debian unstable x86_64. The installation went smoothly; I used an 8GB file as a disk back-end. I went

Compiling NBD kernel module for kernel 3.10.0-514.26.2.el7.x86_64 fails as follows: # make -C ../../ M=`pwd` nbd.o make: Entering directory `/root/rpmbuild/BUILD/kernel-3.10.0-514.26.2.el7/linux-3.10.0-514.26.2.el7.x86_64' CC /root/rpmbuild/BUILD/kernel-3.10.0-514.26.2.el7/linux-3.10.0-514.26.2.el7.x86_64/drivers/block/nbd.o

This patch series introduces the shared ring used by the front-end to pass request descriptors to tapdisk, as well as responses from tapdisk to the front-end. Requests from this ring end up in tapdisk''s standard request queue. When the tapback daemon detects that the front-end tries to connect to the back-end, it spawns a tapdisk and tells it to connect to the shared ring. The shared

This patch series introduces the VHD library. It is based on the blktap2 one, with changes coming from the blktap2.5 one. Signed-off-by: Thanos Makatos <thanos.makatos@citrix.com>

A relatively recent development that spammers got wind of is users that have username==password, with/without the domain. I am tracking numerous 1-off attempts from bots to gain access to mailboxes this way. Situation isn't made any better if you're also using dovecot as SMTP AUTH provider for I am ashamed to admit I've relayed some spam that way. Would it be possible to deny login

Hello I have just set up Asterisk Asterisk 1.4.21.2 on a CentOS 5.2 machine. I am using the OpenVox B200P ISDN card. My problem is that even though chan_misdn module seems to be loaded correctly with Asterisk (I can see it using 'module show' command) the misdn commands are not available to me in the CLI so I cannot tell if my box is correctly interfacing with the ISDN card Any ideas

I noticed that the dirsize backend for quota didn't support any rules and figured it should be easy enough to add ``ignore'' at least. Using mbox storage and only tested with that, but it seems to work as expected for the time being. I'm attaching a relatively small patch for quota-dirsize.c against dovecot-1.1.18 just in case anyone's interested. Best Regards, Thanos

Hi, just subscribed after successfully (?) migrating from a somewhat old linuxconf/vimap config. dovecot-1.1.7, x86 A few issues: The index files seem to be created with the wrong permissions. I get numerous ``Dec 24 15:36:29 mail dovecot: POP3(user at domain): stat(/var/run/dovecot/imap-index/domain/user/.imap/INBOX) failed: Permission denied (euid=60107 egid=231 missing +x perm:

Hello, while investigating a report from Jan-Piet Mens (resulting in http://wiki.powerdns.com/trac/changeset/3109), we discovered that NSD (both 3.2.15 and 4.0.0b4) compresses labels in RP content. As far as I can see, this is not allowed by RFC3597 section 4 paragraph 1/2. PowerDNS Recursor, like Unbound and BIND, now deals with this as 3597 section 4 paragraph 4 says we SHOULD. Nevertheless,

Bellow, follows a proposal for a new opensolaris project. Of course, this is open to change since I just wrote down some ideas I had months ago, while researching the topic as a graduate student in Computer Science, and since I''m not an opensolaris/ZFS expert at all. I would really appreciate any suggestion or comments. PROJECT PROPOSAL: ZFS Compression Algorithms. The main purpose of

Hi there, I''m running several VMs within Xen, and now I''m trying to create/revert snapshots of my VMs. Along with Xen and blktap2, another utility, vhd-util is also delivered, and according to its description, i guess I can use it to create/revert VM snapshots. To create a snapshot is actually easy, I just call |vhd-util snapshot -n aSnapShot.vhd -p theVMtoBackup.vhd | But

(I've already sent this to centos-devel almost a week ago but didn't get any reply.) I'm evaluating dm-cache on kernels 3.18.21-17.el6.x86_64 (Xen 4) and 2.6.32-573.7.1.el6.x86_64 (KVM). The test I do is a simple sequential read using dd(1). read_promote_adjustment and sequential_threshold have been set to 1 and 0, respectively. For the 2.6.32 kernel, all seems to be working fine,

On 03/03/2016 01:22 PM, Thanos Makatos wrote: > I'm trying to debug what I believe to be a kernel bug > (https://lists.centos.org/pipermail/centos-devel/2016-March/014463.html) > and I'm trying to set up systemtap for that. > > I'm trying to set up systemtap on kernel 3.18.21-17.el6.x86_64 (Xen > 4.4.3-10.el6) and it requires the kernel-debuginfo package, however I

Hello zfs-discuss, Is someone actually working on it? Or any other algorithms? Any dates? -- Best regards, Robert mailto:rmilkowski at task.gda.pl http://milek.blogspot.com