Posted by peter |
… Pretty typical controller from
Dell installed on
PowerEdge 1950, 2950 etc …Build in
Battery has to pass through
learning cycle every 3…the docs. During this time
battery backed up cache will be…down for maintenance if this
learning process can’t be scheduled…
Posted by
peter @ 12:21 am ::
hardware ::
Posted by peter |
…’m testing this on has 256MB BBU (
Battery Backed up Cache) on RAID controller so…data size a bit you will well
learn how your cache behaves.
Were even …If you’re wondering which hardware I used for benchmarks – it is
Dell PowerEdge 2950 with PERC5 and 6 …
Posted by Vadim |
…X25-E SSD drive into our lab. I attached it to our
Dell PowerEdge R900. The story making it running… not start with two RAID controllers (
Perc/6i and HighPoint 2300). The problem … put SSD into RAID controller with
battery-backup-ed write cache, but I …
Posted by peter |
… when next
Learn cycle to be:
[root@DB01 ~]# omreport storage
battery controller=0
…
PERC 5/i Integrated (Embedded)
Controller
PERC 5/i Integrated (Slot Embedded)
ID… : 4 days 4 hours
Maximum
Learn Delay : 7 days 0 hours
The …
Posted by
peter @ 10:03 am ::
hardware ::
Posted by Vadim |
… enable replication (log-bin) on server without BBU (
battery backup unit) your InnoDB write performance in concurrent load… is sysbench OLTP load).
I tested it on
Dell PowerEdge R900 with RAID 10 in WriteThrough mode to emulate absence of BBU. With …
Posted by Vadim |
… cfq to noop solved their InnoDB IO problems. I ran tpcc scripts against XtraDB on our
Dell PowerEdge R900 server (16 cores, 8 disks in RAID10, controller
Perc/6i with BBU) to compare cfq, deadline, noop and anticipatory (…
Posted by Sean Kelly |
… (on cent) that gives enough info to go on to disable
battery relearn.
This guy wrote it up and his instructions are explicit and effective.
http://yo61.com/
dell-drac-bbu-auto-
learn-tests-kill-disk-performance.html
-sean
Posted by
Sean Kelly @ 4:48 am ::
hardware ::
Posted by peter |
… I’ve been involved in troubleshooting
Dell Poweredge 2850 system running RAID5 using … by PERC4 (LSI Logic megaraid) controller.
Dell was prompt to ship replacement hard…provide you with such feature.
Happily
Dell Bios has little option which allows…
Posted by
peter @ 12:57 am ::
hardware ::
Posted by peter |
… performing hardware with good price/performance. We use a lot of
Dell PowerEdge 2950 with 6 hard drives … are satisfied that well by vendors.
Dell for example for some reason failed …hard drives in the case in
Dell range, while you can by appropriate…
Posted by peter |
…usually go to “Elite” servers on
Dell web site but looking at … today I went to check
Dell Poweredge R900. This monster takes …(just as we usually configure
PowerEdge 2950) with 128GB of RAM …$16000. This means talking to
Dell Sales rep it can purchases …
Posted by
peter @ 9:15 pm ::
hardware ::
29-30 Jul
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