I think I’m now at the point where I have all the hardware assembled and it’s ready for testing. Now I’m trying to determine what set of fio tests to run. If you know of a set of standard tests, or just have some of your own, please let me know in the comments. The hardware The disks I have assembled are all available via the LSI 9211-8i. The basic hardware specs are: […]
The hardware is ready. What tests to run? Read More »
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
Testing the benchmark scripts – 1 Read More »
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
Benchmarking the TOSHIBA DT01ACA300 – ZFS Read More »
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
zfsroot guides – which one to use? Read More »
Tonight I was reading about ZFS and ZIL devices. I clarified a few things in my mind. ZIL versus SLOG ZFS uses a ZIL (ZFS Intent Log). This can be on the same device as the zpool. If the ZIL is on another device, that device is known as a SLOG (Separate Log). Thus, the ZIL is on the SLOG. It can be very beneficial if the SLOG is a much faster device
ZIL mirroring no longer vital Read More »
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
Benchmarking the Samsung SSD 840 PRO Series DXM03B0Q – ZFS Read More »
I’ve realized that I’m going to need some cables inside this box. 4x SATA Power Splitter Adapter Cable – perhaps 2 x $12 each 3ware CBL-SFF8087OCF-10M 1 Unit of 1M Multi-lane Internal (SFF-8087) Serial ATA Breakout Cable – 2 x $20 each
Miscellaneous cables for the server Read More »
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
Designing a new server, part II Read More »
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
Designing a new server Read More »
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
Idea from Kris Moore – PC-BSD Read More »