similar to: Ext3: Faster deletion for big files?

Hi What is the general state of btrfs RAID6 as of kernel 3.13-rc1 and the latest btrfs tools? More specifically: - Is it able to correct errors during scrubs? - Is it able to transparently handle disk failures without downtime? - Is it possible to convert btrfs RAID10 to RAID6 without recreating the fs? - Is it possible to add/remove drives to a RAID6 array? Regards, Hans-Kristian -- To

hello mailinglist, on gentoo system with qemu-1.6.1, libvirt 1.1.4, libvirt-glib-0.1.7, virt-manager 0.10.0-r1 when i set on virtual machine "cache=none" in the disk-menu, the machine faults to start with: << Fehler beim Starten der Domain: Interner Fehler: Prozess während der Verbindungsaufnahme zum Monitor beendet :qemu-system-x86_64: -drive

Dear list, is anyone using a Tyan Thunder K8HM (S3892) with Xen? Or can recommand a (different) mainboard for: - dual dual-core opteron - about 16GB of RAM - two Gbit ports (for GNBD) - one (or more) SATA ports (system disk) - at last one PCI-X 133 slot. Thanks a lot. -- /"\ Goetz Bock at blacknet dot de -- secure mobile Linux everNETting \ / (c) 2006 Creative Commons,

OK folks, I'm back at it again. Instead of taking my J4400 ( 24 x 1T disks) and making a big RAID60 out of it which Linux cannot make a filesystem on, I'm created 4 x RAID6 which each are 3.64T I then do : sfdisk /dev/sd{b,c,d,e} <<EOF ,,8e EOF to make a big LVM partition on each one. But then when I do : pvcreate /dev/sd{b,c,d,e}1 and then pvdisplay It shows each one as

Hi, have a system consisting of four bricks, using 3.3.2qa3. I used the command gluster volume set glusterKumiko cluster.min-free-disk 20% Two of the bricks where empty, and two were full to just under 80% when building the volume. Now, when syncing data (from a primary system), and using min-free-disk 20% I thought new data would go to the two empty bricks, but gluster does not seem

Hello, I have some performance problems in a file server system. It is used as Samba and NFS file server. I have some ideas what might cause the problems, and I want to try step by step. First I have to learn more about these areas. First I have some questions about tuning/sizing the ext3 journal. The most extensive list I found on ext3 performance tuning is

We discussed using the top bits of the chunk type field field to store a number of redundant disks -- so instead of RAID5, RAID6, etc., we end up with a single ''RAID56'' flag, and the amount of redundancy is stored elsewhere. This attempts it, but I hate it and don''t really want to do it. The type field is designed as a bitmask, and _used_ as a bitmask in a number of

CentOS 6.3, x86_64. I have noticed when building a new software RAID-6 array on CentOS 6.3 that the mismatch_cnt grows monotonically while the array is building: # cat /proc/mdstat Personalities : [raid6] [raid5] [raid4] md11 : active raid6 sdg[5] sdf[4] sde[3] sdd[2] sdc[1] sdb[0] 3904890880 blocks super 1.2 level 6, 512k chunk, algorithm 2 [6/6] [UUUUUU]

I have two openvz servers running Centos 6.x both with 32GB of RAM. One is an Intel Xeon E3-1230 quad core with two 4TB 7200 SATA drives in software RAID1. The other is an old HP DL380 dual quad core with 8 750GB 2.5" SATA drives in hardware RAID6. I want to figure out which one has better random I/O performance to host a busy container. The DL380 currently has one failed drive in the

On Wed, Jun 11, 2014 at 01:00:16PM +0530, abhishek jain wrote: > Hi RIch > > Below are the logs updated logs of libguestfs-test-tool on ubuntu powerpc... > > libguestfs-test-tool > ************************************************************ > * IMPORTANT NOTICE > * > * When reporting bugs, include the COMPLETE, UNEDITED >

Hi, I am trying to create a 10 drive raid6 array. OS is Centos 5.3 (64 Bit) All 10 drives are 2T in size. device sd{a,b,c,d,e,f} are on my motherboard device sd{i,j,k,l} are on a pci express areca card (relevant lspci info below) #lspci 06:0e.0 RAID bus controller: Areca Technology Corp. ARC-1210 4-Port PCI-Express to SATA RAID Controller The controller is set to JBOD the drives. All

We (a small college with about 3000 active accounts) are currently in the process of moving from UW IMAP running on linux to dovecot running on a cluster of 3 or 4 new faster Linux machines. (Initially using perdition to split the load.) As we are building and designing the system, I'm attempting to take (or find) benchmarks everywhere I can in order to make informed decisions and so

On 10/25/2016 11:54 AM, Gordon Messmer wrote: > If you built a RAID0 array of RAID6 arrays, then you'd fail a disk by > marking it failed and removing it from whichever RAID6 array it was a > member of, in the same fashion as you'd remove it from any other array > type. FWIW, what I've done in the past is build the raid 6's with mdraid, then use LVM to stripe them

Hello, ?s there anyway to create raid6 or raid5 level glusterfs installation ? >From docs I undetstood that I can do raid1 base glusterfs installation or radi0 (strapting data too all servers ) and raid10 based solution but raid10 based solution is not cost effective because need too much server. Do you have a plan for keep one or two server as a parity for whole glusterfs system

Is anyone using RAID6 in production? In moving from hardware RAID on my dual 3ware 7500-8 based systems to md, I decided I'd like to go with RAID6 (since md is less tolerant of marginal drives than is 3ware). I did some benchmarking and was getting decent speeds with a 128KiB chunksize. So the next step was failure testing. First, I fired off memtest.sh as found at

On 2017-02-15, John R Pierce <pierce at hogranch.com> wrote: > On 2/14/2017 4:48 PM, tdukes at palmettoshopper.com wrote: > >> 3 - Can additional drive(s) be added later with a changein RAID level >> without current data loss? > > Only some systems support that sort of restriping, and its a dangerous > activity (if the power fails or system crashes midway through

Hi all, we got a new test system here and I just also tested btrfs raid6 on that. Write performance is slightly lower than hw-raid (LSI megasas) and md-raid6, but it probably would be much better than any of these two, if it wouldn''t read all the during the writes. Is this a known issue? This is with linux-3.9.2. Thanks, Bernd -- To unsubscribe from this list: send the line

Hi all, We are building a new system which is going to use ext3 FS. We would like to know more about the behavior of ext3 in the case of failure. But before I procede, I would like to share more information about our future system. * Our application always does an fsync on files * When symbolic links (more specifically fast symlink) are created, the host directory is also fsync'ed. * Our

I have CentOS 6.x installed on a "HP ProLiant DL380 G5" server. It has eight 750GB drives in a hardware RAID6 array. Its acting as a host for a number of OpenVZ containers. Seems like every time I reboot this server which is not very often it sits for hours running a disk check or something on boot. The server is located 200+ miles away so its not very convenient to look at. Is

Hi, I have a 24TB RAID6 disk with a GPT partition table on it. I need to partition it into 2 partitions one of 16TB and 1 of 8TB to put ext4 filesystems on both. But I really need to do this remotely. ( if I can get to the site I could use gparted ) Now fdisk doesn't understand GPT partition tables and pat