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Category Archives: Unix and Linux

Linux/Unix based computers, including NAS servers, VPN servers, cron-running machines, and desktop workstations.

worrbase – CrashPlan on FreeBSD 9.0, A HOWTO

15-Jun-14

I’m blogging this as a reminder to myself on what to do. I found it years ago, but that link doesn’t seem to exist anymore. Anyway, this is a good write-up on FreeBSD 9.0: worrbase – CrashPlan on FreeBSD 9.0, A HOWTO. The only difference betwen this and what I did was that I use […]

NFSv4 ACL history

28-May-14

Good summary of NFSv4 ACL’s (and their history): Implementing Native NFSv4 ACLs in Linux (by Greg Banks at SGI). Be the first to like. Like Unlike

Crucial m500 120GB as a ZFS slog

12-Apr-14

I re-did my benchmarks of my ZFS ZIL using a Crucial m500. The main reason I got this drive is that it has power-loss protection. And, it’s speeds are adequate to keep up with my gigabit Ethernet samba server. Here are the results. My first run was decent, but not stellar:

I didn’t do […]

Crucial m500 120GB benchmarks

09-Apr-14

The latest in my obsession with SSD’s. I jumped on a $70 deal at NewEgg. I bought it to use as a SLOG (ZIL) in my ZFS server, because of its write speeds and because of its power loss protection. I immediately updated the MU03 firmware to MU05. This may be with a SATA II […]

More ZIL/SLOG comparisons

05-Apr-14

Suspicious of my previous tests using iozone, I wrote a small program (that follows) to measure synchronous write speed. I tested this with and without an SLOG device, and then used a really fast Plextor M5 Pro 256GB SSD as the SLOG. I wanted to make sure that something could achieve the fast SLOG speed […]

SLOG tests on a 32GB Kingston SSD with iozone

02-Apr-14

This is a follow-up on my previous post. I ran iozone both with and without the [ccie]-e[/ccie] flag. This flag includes a sync/flush in the speed calculations. This flush should tell ZFS to commit the in-process data to disk, thus flushing it to the SLOG device (or to the on-disk ZIL). I ran 4 tests: […]

ZFS slog (ZIL) considerations

01-Apr-14

Running List of Alternatives 2015-08-11 It looks from this Anandtech article that the m550 does not have as strong power-loss protection as I originally thought. It protects the “lower pages” (least-significant bits) from corruption between page writes. But, it does not protect the DRAM buffer from losing data. 2014-07-07 The Transcend MTS600 line is capable […]

Kingston SV100S2/32 and SV100S2/64 benchmarks

28-Mar-14

Update 2014-04-06: Tests on the 64GB with a $10 Sabrent USB 3.0 Enclosure Added to the end The 64GB SSD has been my solid-state workhorse in my ZFS pool for a while. First, it was the L2ARC, then it was the ZIL. In fact, I used to have two, but I broke the connector off […]

Samba ZFS performance (sequential)

16-Jan-14

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Kingston SV100 64 GB (SV100S264G) Sequential Random Write Benchmark

03-Dec-13

This 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 […]