similar to: Making a zvol unavailable to iSCSI trips up ZFS

Hello, I was doing performance testing, validating zvol performance in particularly, and found that zvol write performance to be slow ~35-44MB/s at 1MB blocksize writes. I then tested the underlying zfs file system with the same test and got 121MB/s. Is there any way to fix this? I really would like to have compatible performance between the zfs filesystem and the zfs zvols. # first test is a

I''m just wondering if anyone has tried this, and what the performance has been like. Scenario: I''ve got a bunch of v20z machines, with 2 disks. One has the OS on it, and the other is free. As these are disposable client machines, I''m not going to mirror the OS disk. I have a disk server with a striped mirror zpool, carved into a bunch of zvols, each exported via

-bash-3.2# zpool export exchbk cannot remove device links for ''exchbk/exchbk-2'': dataset is busy this is a zvol used for a comstar iscsi backend: -bash-3.2# stmfadm list-lu -v LU Name: 600144F0EAC0090000004A0A4F410001 Operational Status: Offline Provider Name : sbd Alias : /dev/zvol/rdsk/exchbk/exchbk-1 View Entry Count : 1 LU Name:

Looks like I forgot to send this to the alias... MRJ ---- A quick heads up for the iscsi, zvol, and vdisk format putback I did into the 3.3 development gate. ISCSI ===== With this putback, you can now install onto and boot a guest using iSCSI disk(s). The iscsi formats supported are: phy:iscsi:/alias/<iscsi-alias> phy:iscsi:/static/<server IP>/<lun>/<target

Hi there. I''m looking at moving my home server to ZFS and adding a second for backup purposes. In the process of researching ZFS I noticed iSCSI. I''m thinking of creating a zvol, share it with iSCSI and use it with my Mac(s). In this scenario, the fs would obviously have to be HFS+. Now, my question is: How would I go about replicating this non-native FS to the backup server?

Folks, >From zfs documentation, it appears that a "vdev" can be built from more vdevs. That is, a raidz vdev can be built across a bunch of mirrored vdevs, and a mirror can be built across a few raidz vdevs. Is my understanding correct? Also, is there a limit on the depth of a vdev? Thank you in advance for your help. Regards, Peter -- This message posted from opensolaris.org

The `lofiadm'' man page describes how to export a file as a block device and then use `mkfs -F pcfs'' to create a FAT filesystem on it. Can''t I do the same thing by first creating a zvol and then creating a FAT filesystem on it? Nothing I''ve tried seems to work. Isn''t the zvol just another block device? -- -Gary Mills- -Unix Group-

Hello, Im new to this discussion lists so i hope im posting in the right place. I started using zfs not too long ago. Im trying to figure out the ISCSI and NFS sharing for the moment. For the ISCSI sharing at the moment im using COMSTAR. A created the appropriate target, also a LU corespondent to the zvol with sbdadm, then created a view attached to this. Im wondering is there a way to actually

I made a filesystem (mke2fs -j) on a logical volume under kernel 2.6.20 on a 64-bit based system, and when I try to mount it, ext3 complains with EXT3-fs: dm-1: couldn't mount because of unsupported optional features (80). I first thought I just forgot to make the filesystem, so I remade it and the error is still present. I ran fsck on this freshly made filesystem, and it completed with

Rick McNeal and I have been working on building support for sharing ZVOLs as iSCSI targets directly into ZFS. Below is the proposal I''ll be submitting to PSARC. Comments and suggestions are welcome. Adam ---8<--- iSCSI/ZFS Integration A. Overview The goal of this project is to couple ZFS with the iSCSI target in Solaris specifically to make it as easy to create and export ZVOLs

I''ve been seeing read and write performance pathologies with Linux ext3 over iSCSI to zvols, especially with small writes. Does running a journalled filesystem to a zvol turn the block storage into swiss cheese? I am considering serving ext3 journals (and possibly swap too) off a raw, hardware-mirrored device. Before I do (and I''ll write up any results) I''d like to know

Hi, I am posting my question to both storage-discuss and zfs-discuss as I am not quite sure what is causing the messages I am receiving. I have recently migrated my zfs volume from b104 to b134 and upgraded it from zfs version 14 to 22. It consist of two zvol''s ''vol01/zvol01'' and ''vol01/zvol02''. During zpool import I am getting a non-zero exit code,

Hi, are there currently any plans to make an iSCSI target created by setting shareiscsi=on on a zvol bindable to a single interface (setting tpgt or acls)? I can cobble something together with ipfilter, but that doesn''t give me enough granularity to say something like: ''host a can see target 1, host c can see targets 2-9'', etc. Also, am I right in thinking without

Here''s something that might of interest to Mac aficionados: http://tenscomplement.com/z-410-storage-main-features -- Maurice Volaski, maurice.volaski at einstein.yu.edu Computing Support, Dominick P. Purpura Department of Neuroscience Albert Einstein College of Medicine of Yeshiva University -------------- next part -------------- An HTML attachment was scrubbed... URL:

Hello All, I am running NTFS over iSCSI on a ZFS ZVOL volume with compression=gzip-9 and blocksize=8K. The server is 2 core P4 3.0 Ghz with 5 GB of RAM. Whenever I start copying files from Windows onto the ZFS disk, after about 100-200 Mb been copied the server starts to experience freezes. I have iostat running, which freezes as well. Even pings on both of the network adapters are reporting

I created a filesystem as follows: mke2fs -j -O dir_index -O sparse_super -T largefile /dev/drbd/6 Here's the the output from df Filesystem Size Used Avail Use% /dev/drbd/6 475G 33M 452G 1% It seems that ext3 has taken 23 GB, which is about 5% of the total disk size, for itself. Is that right? If that is, indeed, the case, why does df just list 33M as being

We are looking into the possibility of adding a dedicated ZIL and/or L2ARC devices to our pool. We are looking into getting 4 ? 32GB Intel X25-E SSD drives. Would this be a good solution to slow write speeds? We are currently sharing out different slices of the pool to windows servers using comstar and fibrechannel. We are currently getting around 300MB/sec performance with 70-100% disk busy.

I need to get around the requirement of --exclude=* to have all the parent directories of the files and directories that are to be included. So given the file.. /startdirectory/subdirectory1/subdirectory2/filetobecopied I need to include / /subdirectory1 /subdirectory1/subdirectory2 I could just include the entire directory structure , but alternatively just include the needed paths. So the

Hello, I?m using ZFS to export some iscsi targets for the virtual box iscsi initiator. It works ok if I try to install the guest OS manually. However, I?d like to be able to import my already prepared guest os vdi images into the iscsi devices but I can?t figure out how to do it. Each time I tried, I cannot boot. It only works if I save the manually installed guest os and re-instate the same

If I login to our Samba box (RedHat 7.1 + 2.4.20) under Windows 2K via Start->Run->share name, I get logged in almost immediately. It averages about 25 seconds under XP. This behavior has been true in various versions of Samba since I believe XP was available and is reproducible on every (several) Windows 2K/XP boxes I have tried. This is a workgroup environment with Samba acting as