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Category Archives: Unix and Linux
Samba ZFS performance (sequential)
16-Jan-14This SSD caught my eye as a ZIL. I wonder how it compares to my previously benchmarked (a number of times) Kingston SV100 64 GB SSD. I decided to remove it from the ZIL and try it out. I wanted to make sure I exercise the sequential writes (which is all I really care about […]
Debugging USB 3.0 Interrupts
28-Oct-13I’m seeing interrupt storm errors. I’ve also noticed that my USB 3.0 GoFlex 2TB drive (which I have to brag I bought for $67 back in 2009 or so) seems to be intermittently absent from my ZFS pool. Here’s a vmstat: Notice the crazy > 7000 interrupt rate on irq16. Note that one downside of […]
Plextor 256GB M5 Pro SSD Benchmark
25-Jul-13Using Crystal Disk Mark and stock firmware (just got it yesterday). Drive label says firmware 1.02. Formated at NTFS with default settings. After upgrade to latest firmware (1.05): New firmware greatly improved queue depth of 32 (QD=32) performance. Be the first to like. Like Unlike
Sandisk 5000 SSD Measurements
16-Dec-12These are a couple of old 8GB (7.5GbB). Their specs are like so: Doing sequential read measurements (I have two of these SSD’s, one as tank_zil0 and one as tank_zil1): Doing sequential write measurements: I didn’t want to write directly to the raw device, as I didn’t want to delete the GPT partition table. Anyway, […]
RAIDZ bonnie++ measurements
15-Oct-12Just rebuilt my ZFS pool using RAIDZ:
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NAME STATE READ WRITE CKSUM tank ONLINE 0 0 0 raidz1-0 ONLINE 0 0 0 gpt/WD15EARS ONLINE 0 0 0 gpt/WD20EARS ONLINE 0 0 0 gpt/ST1500 ONLINE 0 0 0 logs gpt/tank_zil0 ONLINE 0 0 0 gpt/tank_zil1 ONLINE 0 0 0 cache gpt/tank_cache0 ONLINE 0 0 0 gpt/tank_cache1 ONLINE 0 0 0 |
So, time for another bonnie++ benchmark (all interfering service disabled including powerd): Version 1.96 Sequential Output Sequential Input Random Seeks Sequential Create Random Create Size Per Char Block Rewrite Per Char Block Num Files Create Read Delete Create Read Delete K/sec % CPU K/sec % CPU K/sec […]
Bonnie++ benchmarks on ZFS
02-Sep-12Summary Version 1.96 Sequential Output Sequential Input Random Seeks Sequential Create Random Create Size Per Char Block Rewrite Per Char Block Num Files Create Read Delete Create Read Delete K/sec % CPU K/sec % CPU K/sec % CPU K/sec % CPU K/sec % CPU /sec % CPU /sec % CPU /sec % CPU /sec % […]
Autohotkey for Exceed on Demand Alt keys
14-Jun-12Exceed on Demand only sends the right Alt key to the viewed X desktop (Linux machine you’re logging into). I use this AutoHotkey script to send both Alt keys to Linux: Be the first to like. Like Unlike
Note that the Samba shares resides in a ZFS pool with dedup turned on. Since the blocks that make up the file being sent are probably already on the pool, it’s not necessarily writing the block data to disk. Using the same method as last time: Whoa. That’s way worse than before. Let’s re-run each: […]
Either build Java without IPv6, or you need the following in /etc/rc.conf: (The is if you’re running without an X console.) Also, delete everyting in except for and and rename these and respectively. Make sure is the owner of everything (including your subsonic databases in ). While you’re here, edit and change to (just an […]
