ZFS

Testing the benchmark scripts – 1

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I’m getting very slow throughput on these drives during my first set of tests. I have no idea why… The drive in question is: $ grep ada2 /var/run/dmesg.boot ada2 at ahcich4 bus 0 scbus5 target 0 lun 0 ada2: <ST2000DM001-1CH164 CC24> ATA-8 SATA 3.x device ada2: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes) ada2: Command Queueing enabled ada2: 1907729MB (3907029168 512 byte sectors: 16H 63S/T 16383C) ada2: Previously was known as ad12 Here […]

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Benchmarking the TOSHIBA DT01ACA300 – ZFS

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This is a repeat of a benchmark I did yesterday. The drive is a TOSHIBA DT01ACA300 3TB HDD. This is a 7200 RPM SATA III drive. Tests were run with FreeBSD 9.1 in the hardware listed below. Tonight, we’re going to do the partitions slightly differently, and try ZFS. The hardware We are testing on the following hardware: motherboard – SUPERMICRO MBD-H8SGL-O ATX Server Motherboard (Supermicro link): $224.99 CPU – AMD Opteron 6128

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zfsroot guides – which one to use?

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I started looking around for guides for creating a zfsroot. Here is what I’ve glanced at so far, along with some of my comments. I plan to create an 8 drive array, running raidz2. FreeBSD wiki page – seems OK ZFS-only booting by Ollivier Robert – based on 8.0, but I need to read it through again OPTI­MIZED FOR 4K-SECTOR DRIVES – interesting, but not set up the way I want my system

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Benchmarking the Samsung SSD 840 PRO Series DXM03B0Q – ZFS

3 Comments / Disks, File Systems, hardware, ZFS / By /

Following on from yesterday’s benchmark, I’m adding in some ZFS tests. All hardware is the same. Of note: $ zdb | grep ashift ashift: 9 $ sudo diskinfo -v ada0 Password: ada0 512 # sectorsize 128035676160 # mediasize in bytes (119G) 250069680 # mediasize in sectors 0 # stripesize 0 # stripeoffset 248085 # Cylinders according to firmware. 16 # Heads according to firmware. 63 # Sectors according to firmware. S12PNEACB31368P # Disk

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Designing a new server, part II

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After posting the original plan, I’ve made a few changes, highlighted below in bold Here is what I’m thinking of getting: SUPERMICRO MBD-H8SGL-O ATX Server Motherboard : $224.99 AMD Opteron 6128 Magny-Cours 2.0GHz 8 x 512KB L2 Cache 12MB L3 Cache Socket G34 115W 8-Core Server : $259.99 Kingston 8GB 240-Pin DDR3 SDRAM ECC Registered DDR3 1600 Server Memory : 4 x $59.99 = $239.96 PC Power and Cooling Silencer MK III 600W

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Designing a new server

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I think I may have to put together a new server. For home use. Here is what I’m thinking of getting: SUPERMICRO MBD-H8SGL-O ATX Server Motherboard : $224.99 AMD Opteron 6128 Magny-Cours 2.0GHz 8 x 512KB L2 Cache 12MB L3 Cache Socket G34 115W 8-Core Server : $259.99 Kingston 8GB 240-Pin DDR3 SDRAM ECC Registered DDR3 1600 Server Memory : 4 x $59.99 = $239.96 PC Power and Cooling Silencer MK III 600W

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Idea from Kris Moore – PC-BSD

2 Comments / File Systems, FreeBSD, Jails, ZFS / By /

I’m sitting in the The Warden – FreeBSD and Linux Jail Management talk at EuroBSDCon 2012. He has mentioned two things, so far, that give me ideas. Evil ideas. Put each jail in a different ZFS data set – this may be useful for my jails running Bacula regression testing Schedule cron jobs to do snapshots on a regular basis – useful for snapshots, which I’m not really using at all And he’s

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Destroying some unneeded ZFS snapshots

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Last night, I found that I had a number of unused ZFS snapshots. I decided to destroy some of them. The first destroy locked up the system. Nagios reported everything was dead. I remotely power cycled the system. After it came back, I noticed that a scrub was in progress. This had not been initiated because of the power cycle. The scrub was a weekly automatic operation which started some hours before my

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