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Recent content by TechTrend

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    HBA errors on OmniOS ZFS install

    'lsiutil' from the link below allows disabling PHY on option #13 (Change SAS IO Unit settings). After disabling PHYs 4 to 7 there are no more "Aborted_command" messages and no hard errors on disk I/O. Will check the cabling and backplane when I am back at that site, but this allows the server to...
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    HBA errors on OmniOS ZFS install

    The 'sasinfo hba-port -vly' on the server with mechanical drives shows 8 PHYs as expected and no errors. There may be a problem with PHY #5 on the SFF-8087 cable or the backplane. Since only 4 drives are installed and the server is remote, a temporary solution may be to disable PHYs #4 to #7...
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    HBA errors on OmniOS ZFS install

    I am using a Dell C2100 server for ZFS using the napp-it all in one install with OmniOS (thanks, Gea!). The HBA is a Dell Perc H310 (LSI2008) flashed with Dell's IT firmware. The drives are four Samsung 840 1TB SSDs in a pool with two 2-drive mirrors (2x2). A similar config with mechanical...
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    Restrict Interfaces on ZFS Server

    I use a VM with OpenIndiana/ illumos and napp-it as a virtual SAN. It is configured with 3 virtual gigabit interfaces, one connected to a public LAN and two to a private iSCSI LAN. How can I restrict the NFS and Comstar iSCSI services to only handle requests on the two private interfaces...
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    ZFS Deduplication in Open Indiana

    This post to the zfs-discuss list has additional insights on the caveats of ZFS deduplication. http://mail.opensolaris.org/pipermail/zfs-discuss/2011-July/049209.html Summary: Dedup memory and performance (again, again) Deduplication logic on commercial SANs appears to be more memory...
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    ZFS Deduplication in Open Indiana

    Thanks for all the replies and the great feedback. Given that the cluster is using 25% of the storage available and deduplication has significant caveats with limited RAM, I'll skip on using deduplication for now. When storage requirements increase I'll decide whether to increase RAM and enable...
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    ZFS Deduplication in Open Indiana

    Thanks for your response. Would it be more stable in NexentaStor 3.x or is their ZFS codebase the same as in Open Indiana 151a?
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    Expand ZFS LUN used for VMFS5 Datastore

    I have an Open Indiana 151a system serving LUNs to a small vSphere Essentials cluster via Comstar iSCSI. If the LUN is expanded in Open Indiana, are there any operations required on vSphere besides re-scanning the datastores? The LUNs are used by active VMs in a live production environment...
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    ZFS Deduplication in Open Indiana

    I have a production setup with Open Indiana 151a, napp-it 0.6r, E3-1230 Xeon quad core CPU, 16 GB ram, five GigE interfaces (4 for iSCSI), one 500 GB SATA2 boot disk, one 64GB SSD for read cache, one 64GB SSD for logs and six 2TB SATA2 drives setup as three 2-disk mirrored vdevs. This is a...
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    Poor write performance using all-in-one server (ESXi + Solaris + napp-it)

    Using Target Portal Groups in Comstar turned out to be a good way to restrict iSCSI targets to some interfaces. Using napp-it, this can be done with these menu options: Comstar, Target Portal Groups, Create Comstar, Targets, Add Portal
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    Poor write performance using all-in-one server (ESXi + Solaris + napp-it)

    One workaround for this may be to reduce the startup delay for the SAN VM (to 10 secs?) while leaving the other internal VMs with the default (120 secs). You can override the startup delay using the VSphere client by selecting Configuration, VM Startup/Shutdown, Properties. Of course, that...
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    Benchmark software to test storage alternatives

    I recently built an all-in-one (thanks, Gea) and am comparing the performance of several file service alternatives (NFS, iSCSI, SMB) . The IOmeter and HD Tune utilities are good but they require a Windows front end and all of my tests are done with Linux VMs. Which Linux benchmark software is...
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    Poor write performance using all-in-one server (ESXi + Solaris + napp-it)

    I was leaning towards NFS because of the advantages of having file level access to the VM directories. It is also simpler to setup. Yet this write performance issue is making me reconsider. Some NFS clients are VMs on physical servers external to the all-in-one. If the SAN crashes those external...
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    Poor write performance using all-in-one server (ESXi + Solaris + napp-it)

    Thanks for your suggestions. Your argument about RAIDZ being faster than RAID10 on writes because of the spindle activity sounds logical. I'll check on the web for ZFS data to determine if I should recreate the pool with RAIDZ. I agree with you that using an SSD for boot was probably an...
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    Poor write performance using all-in-one server (ESXi + Solaris + napp-it)

    I have a similar all-in-one setup. Mine has a SuperMicro X9SCI-LN4F-O, Xeon E3-1230 Sandy Bridge and 16 GB RAM. There are 6x2TB Hitachi 7k3000 drives in a striped mirror (ZFS "RAID10"?), a 120GB SSD as a boot drive and a 64GB SSD as read cache. Three of the the 4 GigE ports are load balanced and...
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