similar to: rsync remote raw block device with --inplace

These responses have been very useful. Thanks especially to *Roland* devzero at web.de <rsync%40lists.samba.org?Subject=Re%3A%20Aw%3A%20Re%3A%20rsync%20remote%20raw%20block%20device%20with%20--inplace&In-Reply-To=%3Ctrinity-177d08a5-29f5-475c-916b-85273fc31962-1546203055586%403c-app-webde-bs15%3E>because...I'm installing diskrsync <https://github.com/dop251/diskrsync> . So

> There have been addons to rsync in the past to do that but rsync really > isn't the correct tool for the job. why not correct tool ? if rsync can greatly keep two large files in sync between source and destination (using --inplace), why should it (generally spoken) not also be used to keep two blockdevices in sync ? maybe these links are interesting in that context:

It was broucht up before indeed: https://lists.samba.org/archive/rsync/2012-June/027680.html On 12/30/18 9:50 PM, devzero--- via rsync wrote: >> There have been addons to rsync in the past to do that but rsync really >> isn't the correct tool for the job. > why not correct tool ? > > if rsync can greatly keep two large files in sync between source and destination >

Hi, currently i'm following https://wiki.libvirt.org/page/Live-disk-backup-with-active-blockcommit. I 'm playing around with it and it seems to be quite nice. What i want is a daily consistent backup of my image file of the guest. I have the idea of the following procedure: - Shutdown the guest (i can live with a downtime of a few minutes, it will happen in the night). And i think

It would be very nice to be able to rsync the raw data content of, e.g., a non-mounted disk partition, particularly in combination with --inplace. Our reality: several dual-boot machines running Windows during the day and Linux at night, during backups. Windows is very tedious and iffy to re-reinstall without a raw disk image to start from. Disks fail, and the ensuing downtime must be

Hi! i have a problem with iotop : root at alien: ~ # iotop Traceback (most recent call last): File "/usr/bin/iotop", line 16, in ? main() File "/usr/lib/python2.4/site-packages/iotop/ui.py", line 567, in main main_loop() File "/usr/lib/python2.4/site-packages/iotop/ui.py", line 557, in <lambda> main_loop = lambda: run_iotop(options) File

Il 07-09-2018 21:26 Eric Blake ha scritto: > We're also trying to add support for incremental backups into a future > version of libvirt on top of the qemu 3.0 feature of persistent > bitmaps in qcow2 images, which could indeed guarantee that you > transfer only the portions of the guest disk that were touched since > the last backup. But as that's still something I'm

On 2020-04-30 22:56, Jeremy Allison via samba wrote: > On Thu, Apr 30, 2020 at 10:25:49AM +0200, A L wrote: > >> So I did some more tests. smbclient mget does not copy in the same way >> Windows Explorer does. When copying in Windows Explorer, there are many >> multiple concurrent threads used to transfer the files. With smbclient mget >> there are no corruptions,

Hi, I've noticed huge write amplification problem with thinly provisioned logical volumes and I wondered if anyone can explain why it happens and if and how can be fixed. The behavior is the same on Centos 6.8 and Centos 7.2. I have a NVME card (Intel DC P3600 -2 TB) on which I create a thinly provisioned logical volume: pvcreate /dev/nvme0n1 vgcreate vgg /dev/nvme0n1 lvcreate

Is there something like iotop in rpm form available for Centos 4.x? Matt

On 11/11/19 1:37 PM, Robert Moskowitz wrote: > OK.? That is interesting.? I am assuming tps is transfers per sec? > > I would have to get a stop watch, but it seems to go a bit of time, and > then a write. > > Is there something that would accumulate this and give me a summary over > some period of time?? Of course it better NOT be doing its own IOs... I like iostat -x 4

Hi, We have found that exist a huge degradation in performance when doing I/O to a disk images contained in single files from a paravirtualized domain and from an HVM at the same time. The problem was found in a Xen box with Fedora 8 x86_64 binaries installed (Xen 3.1.0 + dom0 Linux 2.6.21). The test hardware was a rack mounted server with two 2.66 Ghz Xeon X5355 (4 cores each one, 128 Kb L1

Hi ! I have a server (Centos 5) that is using a pair of SAS drives to store the data. (Mail server) They are on an adaptec raid controler with a battery backup and write back cache active. >From time to time, I have sever peak io to those data disks (> 400 to 500 iops, > 70 to 100 megs/sec). With iostat, I find that it's almost a write i/o problem. How can I find to which files

Hello all, I've got heavy troubles with my ocfs2 environment. Cluster filesystem worked fine for about 3-6 weeks after initial setup, but since 1 week performance issues occurs. I've already searched long time in google and on this mailing list but I wasn't able to found any solution. I've found a lot of posts with "same" problems but without the magic answer :-)

"Miloslav" == Miloslav H?la <miloslav.hula at gmail.com> <miloslav.hula at gmail.com> writes: Miloslav> Dne 09.09.2020 v 17:52 John Stoffel napsal(a): Miloslav> There is a one PCIe RAID controller in a chasis. AVAGO Miloslav> MegaRAID SAS 9361-8i. And 16x SAS 15k drives conneced to Miloslav> it. Because the controller does not support pass-through for

hi, i use libvirt 1.0.2 (-r1 , gentoo linux). when i create a vm with win7 guest, virtio nic, virtio hdd, all is running fine. but when i shutdown the windows guest, it takes somestimes 20-34 minutes !!! iotop shows me in the whole time writing with 2,xxmb/sec. is the complete machine "rewritten" to disk? i use disk.images on a raid6, but hey, dd shows me it can writes there with

Hey, I''ve a 2x4TB RAID1 setup with btrfs on kernel 3.8.0. Under high I/O load (BackupPC dump or writing a large file over gigabit) I get messages in syslog such as the one mentioned in the subject. The full non-logcheck-ignored log is under [1]. A BackupPC dump between the same exact machines onto a 2TB ext4 volume take 90 minutes on average, the process on the btrfs volume took 465

Hello, I''m a newby to dtrace and have just installed the dtrace toolkit v0.92 on a core soalris 10 1/06 installation on SUN v40z. I have tried the following commands: iotop iosnoop but I get the message dtrace: invalid probe specifier and a lot of code. At the end it says: : in action list: failed to resolve uid: Unknown variable name Could it be, that there are some

Hi, I'm running dovecot 2.2.x and I'm having an issue where I see many dovecot processes use all the available IO on a server. According to iotop the worst offenders seem to be in this state (NOTE: I swapped in phony username & IP info): dovecot/imap [someusername 123.456.789.012 UID SEARCH] The server in question is running with Maildirs on top of an XFS filesystem. Is there

I updated my backup server this weekend from CentOS 7 to CentOS 8. OS disk is SSD, /dev/md0 are two 4TB WD mechanical drives. No hardware was changed. 1. wiped all drives 2. installed new copy of 8 on system SSD 3. re-created the 4TB mirror /dev/md0 with the same WD mechanical drives 4. created the largest single partition possible on /dev/md0 and formatted it ext4 5. waited several hours for the