Evilcoder.org

Jikes, indeed that was the thing I thought this morning. I decided to move out my old shares and copy over all the data (270GB) to my workstation temporary and move over the RAID-5 volume to ZFS (backed by a Highpoint ATA454, yeah cheap-ass stuff, if someone has an idea on an affordable real-hardware raid5 device which supports SATA300, please comment on the post :-)).

The raid5 volume consists for 4×300GB, normally resulting in 1.2TB storage, with the raid5 solution we have redundancy and gain around 900GB of data storage available.

But OK i am loosing track: I did the 270GB in around 6.5hours, roughly 40GB per hour, copy actions did around 13MB/s over the network (peaking at 30% of the GBIT link that is used between the servers) and all went without a glitch.

Since I dont have a binary backed driver at the moment, freebsd recognizes the raid array as ar0, resulting in the following:

[remko@guardian /home]$ zpool status
pool: data
state: ONLINE
scrub: none requested
config:

NAME STATE READ WRITE CKSUM
data ONLINE 0 0 0
ar0 ONLINE 0 0 0

errors: No known data errors

Currently the following is available;
[remko@guardian /home]$ zfs list
NAME USED AVAIL REFER MOUNTPOINT
data 133G 741G 25K /data

ofcourse somewhat more but that’s my private data et all thus no need to be verbose on that.
This configuration might not be as fancy as others have (multi TB arrays ;-)) but perhaps the future can arrange me the SATA300 controller backed with 4 or more 500GB disks

Currently the data is being copied back, around 200GB had already been copied since the setup; and no creepy things had been found, peaks are again around the 13MB/s which is quite good imo.

I am not very sure whether the attached data is going to help a bit but:

kstat.zfs.misc.arcstats.hits: 416906
kstat.zfs.misc.arcstats.misses: 13678
kstat.zfs.misc.arcstats.demand_data_hits: 229801
kstat.zfs.misc.arcstats.demand_data_misses: 249
kstat.zfs.misc.arcstats.demand_metadata_hits: 173607
kstat.zfs.misc.arcstats.demand_metadata_misses: 11696
kstat.zfs.misc.arcstats.prefetch_data_hits: 12366
kstat.zfs.misc.arcstats.prefetch_data_misses: 0
kstat.zfs.misc.arcstats.prefetch_metadata_hits: 1132
kstat.zfs.misc.arcstats.prefetch_metadata_misses: 1733
kstat.zfs.misc.arcstats.mru_hits: 173761
kstat.zfs.misc.arcstats.mru_ghost_hits: 5799
kstat.zfs.misc.arcstats.mfu_hits: 229653
kstat.zfs.misc.arcstats.mfu_ghost_hits: 2088
kstat.zfs.misc.arcstats.deleted: 1635502
kstat.zfs.misc.arcstats.recycle_miss: 920453
kstat.zfs.misc.arcstats.mutex_miss: 21
kstat.zfs.misc.arcstats.evict_skip: 189460
kstat.zfs.misc.arcstats.hash_elements: 13992
kstat.zfs.misc.arcstats.hash_elements_max: 29668
kstat.zfs.misc.arcstats.hash_collisions: 336691
kstat.zfs.misc.arcstats.hash_chains: 2217
kstat.zfs.misc.arcstats.hash_chain_max: 6
kstat.zfs.misc.arcstats.p: 295031867
kstat.zfs.misc.arcstats.c: 295499774
kstat.zfs.misc.arcstats.c_min: 16777216
kstat.zfs.misc.arcstats.c_max: 314572800
kstat.zfs.misc.arcstats.size: 295506432

there it is. Well onward in perhaps writing something for VuXML, a topic on which we still need (continues) help!

written by Remko

OK no updates for a few days, that had several reasons ;-).

I had a few days off in the weekend and made up with a lot of
ongoing FreeBSD work that was still pending, so some people
are happy now again, which is always something nice to see

Beyond that I also relaxed a lot, and tried to do various things
in between that also needed work and attention, and that worked
out very well actually.

Today was my day off and I went to the city with Denise and we
shopped around a bit, ate something and then headed over to pick
up our kid at his school ; he was surprised to see me because
normally he knows when I come around, but this time we didn’t
tell him

His reactions where very cute and nice so that melted me away

We (Denise, Luca and myself) went to their house where Luca played
a little game and I surveyed one of the machines there to be able
to get the machine back online again, I think I have enough information
to do so during the weekend; so lets see what we can do to make it
happen.

Today was a nice day, after last weeks troubles etc, it was a good
thing for a change, thanks Luca and Denise for that!

written by Remko