search for: comstar

Hi, WARNING: Long post ahead I have an issue when starting multipathd. The kernel complains about "blk_cloned_rq_check_limits: over max segments limit". The server in question is configured for KVM hosting. It boots via iBFT to an iSCSI volume. Target is COMSTAR and underlying that is a ZFS volume (100GB). The server also has two infiniband cards providing four (4) more paths over SRP (SCSI RDMA Protocol). With multipathd in the initramfs and enabled at boot, I get five paths (but also now the blk_cloned_req_check_limits error) on boot. I/O on the boot vo...

...zvol/rdsk/vg_satabeast8_vol0/lv_test bs=1M count=32768 32768+0 records in 32768+0 records out 34359738368 bytes (34 GB) copied, 766.247 s, 44.8 MB/s >uname -a SunOS zfs-debug-node 5.11 snv_130 i86pc i386 i86pc Solaris I believe this problem is affecting performance tests others are doing with Comstar and exported zvol logical units. Steffen _______________________________________________________________________________________________ Steffen Plotner Amherst College Tel (413) 542-2348 Systems/Network Administrator/Programmer PO BOX 5000 Fa...

I have added a specification of probes for the fibre channel COMSTAR port provider to the DTrace section of wikis.sun.com. The proposal may be found here: http://wikis.sun.com/display/DTrace/fibre+channel+Provider I welcome feedback regarding this proposal. Thanks, Sam

Hello all, I am running an OpenSolaris server running 06/09. I installed comstar and enabled it. I have an ESXi 4.0 server connecting to Comstar via iscsi on its own switch. (There are two esxi servers), both of which do this regardless of whether one is on or off. The error I see is on esxi "Lost connectivity to storage device naa.600144f030bc450000004a9806980003. Path v...

Hi, I have a zfs volume that''s exported via iscsi for my wife''s Mac to use for Time Machine. I''ve just built a new machine to house my "big" pool, and installed build 129 on it. I''d like to start using COMSTAR for exporting the iscsi targets, rather than the older iscsi infrastructure. I''ve seen quite a few tutorials on how to use COMSTAR for new volumes (and a few mentions of the shareiscsi=stmf). I''ve seen some talk about how the old infrastructure used to use the first 64K of th...

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,

The iscsit_dtrace_draftv5.txt describes the Dtrace probes definition for the COMSTAR iSCSI target port provider. For all those interested in iSCSI, please take a look and send me your feedback/questions/suggestions etc by Thursday, April 20, 2009 thanks Priya -------------- next part -------------- An embedded and charset-unspecified text was scrubbed... Name: iscsit_dtrace_draf...

...Dtrace probes definition (sent on April 23) was only to solicit feedback from all prospective users of iSCSI DTrace probes. I will follow up shortly with an updated document requesting approval from the community. thanks Priya -------- Original Message -------- Subject: Dtrace provider for the COMSTAR iscsi Target Port Provider - Review Request Date: Thu, 23 Apr 2009 14:43:38 -0400 From: Priya Krishnan <Priya.Krishnan at sun.com> Reply-To: Priya.Krishnan at sun.com To: dtrace-discuss at opensolaris.org The iscsit_dtrace_draftv5.txt describes the Dtrace probes definition for the CO...

Hi, Nexenta CP and NexentaStor has integrated COMSTAR with ZFS, which provides 2-3x performance gain over userland SCSI target daemon. I;ve blogged in more detail at http://www.gulecha.org/2009/03/03/nexenta-iscsi-with-comstarzfs-integration/ Cheers, Anil http://www.gulecha.org

I would like to request approval of the the DTrace proposal for the COMSTAR iSCSI target port provider. I have updated the specification of the iscsi provider at http://wikis.sun.com/display/DTrace/iscsi+Provider. Your feedback is appreciated. thanks Priya -------------- next part -------------- An embedded and charset-unspecified text was scrubbed... Name: iscsit_dtr...

Hi all, Using "old" way of sharing volumes over iscsi in zfs (zfs set shareiscsi=on) i can see i/o stats per iscsi volume running a command iscsitadm show stats -I 1 volume. However i couldn''t find something similar in new framework,comstar. Probably i''m missing something, so if anyone has some tips please share it :) Thanks in advance, Bruno -------------- next part -------------- A non-text attachment was scrubbed... Name: smime.p7s Type: application/pkcs7-signature Size: 3656 bytes Desc: S/MIME Cryptographic Signature UR...

I apologize if this has been covered before. I have not seen a blow-by-blow installation guide for Ubuntu onto an iSCSI target. The install guides I have seen assume that you can make a target visible to all, which is a problem if you want multiple iSCSI installations on the same COMSTAR target. During install Ubuntu generates three random initiators and you have to deal with them to get things working correctly. I did this for a few reasons: 1. I have some PCs which already have another OS installed on them and want Ubuntu available without any changes to the local drive 2. I wa...

Hello list, I started playing aroud with Comstar in snv_134. In snv_116 version of ZFS, a new hidden property for the Comstar MetaData has been intoduced (stmf_sbd_lu). This makes it possible to migrate from legacy (iscsi target daemon) to Comstar without data loss, which is great. Before this property you always lost the first 64k of your zvol...

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. Opensolaris snv_134 Dual 3.2GHz quadcores with hyperthreading 16GB ram Pool_1 ? 18 raidz2 groups with 5 drives a piece and 2 hot spares Disks are around 30% full No dedup -- This message posted from op...

...is I want to create 2xraidz2 pools instead of expanding my current 2xraidz1 pool. So I''ll create a 1xraidz2 vdev, migrate my current 2xraidz1 pool over, destroy that pool and then add it as a 1xraidz2 vdev to the new pool. I''m running b130, sharing both with CIFS and ISCSI (not comstar), multiple decedent file systems. Other than a couple VirtualBox machines that use the pool for storage (I''ll shut them down), nothing on the server should be messing with the pool. As I understand it the old way of doing iSCSI is going away so I should plan on Comstar. I''m als...

-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: 600144F0EAC0090000004A1307D20001 Operational Status: Offl...

I''m looking at upgrading a box serving a lun via iSCSI (Comstar) currently running snv_121. The initiators are cluster pair running SLES11. Any gotchas that I should be aware of? Sys Specs are: 2 Xeon E5410 procs 8 GB RAM 12 10K Savios 1 X25-E as ZIL Supermicro rebranded LSI SAS controller The drives are configured as a single mirrored pool Thanks in adva...

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 delete a zvol ignoring the fact that it has attached LU? I noticed the -f option does not help in this specific case. I know it can be del...

sbdadm can be used with a regular ZFS file or a ZFS block device. Is there an advatage to using a ZFS block device and exporting it to comstar via sbdadm as opposed to using a file and exporting it? (e.g. performance or manageability?) Also- let''s say you have a 5G block device called pool/test You can resize it by doing: zfs set volsize=10G pool/test However if the device was already imported into comstar then stmfadm list-lu...

This is probably unreproducible, but I just got a panic whilst scrubbing a simple mirrored pool on scxe snv124. Evidently on of the disks went offline for some reason and shortly thereafter the panic happened. I have the dump and the /var/adm/messages containing the trace. Is there any point in submitting a bug report? The panic starts with: Jan 19 13:27:13 host6