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lesperance
2016 May 25
2
Slow RAID Check/high %iowait during check after updgrade from CentOS 6.5 -> CentOS 7.2
[merging]
The HBA the drives are attached to has no configuration that I?m aware of. We would have had to accidentally change 23 of them ?
Thanks,
Kelly
On 2016-05-25, 1:25 PM, "Kelly Lesperance" <klesperance at blackberry.com> wrote:
>They are:
>
>[root at r1k1 ~] # hdparm -I /dev/sda
>
>/dev/sda:
>
>ATA device, with non-removable media
> Model Number: MB4000GCWDC
> Serial Number: S1Z06RW9
> Firmware Revision: HPGD...
2016 May 25
0
Slow RAID Check/high %iowait during check after updgrade from CentOS 6.5 -> CentOS 7.2
Hdparm didn?t get far:
[root at r1k1 ~] # hdparm -tT /dev/sda
/dev/sda:
Timing cached reads: Alarm clock
[root at r1k1 ~] #
On 2016-05-25, 2:44 PM, "Kelly Lesperance" <klesperance at blackberry.com> wrote:
>The HBA is an HP H220.
>
>We haven?t really benchmarked individual drives ? all 12 drives are utilized in one RAID-10 array, I?m unsure how we would test individual drives without breaking the array.
>
>Trying ?hdparm -tT /dev/sda? now ? it?s been run...
2016 May 25
6
Slow RAID Check/high %iowait during check after updgrade from CentOS 6.5 -> CentOS 7.2
...te:
>> [merging]
>>
>> The HBA the drives are attached to has no configuration that I?m aware of. We would have had to accidentally change 23 of them ?
>>
>> Thanks,
>>
>> Kelly
>>
>> On 2016-05-25, 1:25 PM, "Kelly Lesperance" <klesperance at blackberry.com> wrote:
>>
>>> They are:
>>>
>>> [root at r1k1 ~] # hdparm -I /dev/sda
>>>
>>> /dev/sda:
>>>
>>> ATA device, with non-removable media
>>> Model Number: MB4000GCWDC...
2016 May 25
0
Slow RAID Check/high %iowait during check after updgrade from CentOS 6.5 -> CentOS 7.2
....05.2016 19:26, Kelly Lesperance wrote:
> [merging]
>
> The HBA the drives are attached to has no configuration that I?m aware of. We would have had to accidentally change 23 of them ?
>
> Thanks,
>
> Kelly
>
> On 2016-05-25, 1:25 PM, "Kelly Lesperance" <klesperance at blackberry.com> wrote:
>
>> They are:
>>
>> [root at r1k1 ~] # hdparm -I /dev/sda
>>
>> /dev/sda:
>>
>> ATA device, with non-removable media
>> Model Number: MB4000GCWDC
>> Serial Number: S1Z06...
2016 May 25
3
Slow RAID Check/high %iowait during check after updgrade from CentOS 6.5 -> CentOS 7.2
Kelly Lesperance wrote:
> LSI/Avago?s web pages don?t have any downloads for the SAS2308, so I think
> I?m out of luck wrt MegaRAID.
>
> Bounced the node, confirmed MPT Firmware 15.10.09.00-IT.
> HP Driver is v 15.10.04.00.
>
> Both are the latest from HP.
>
> Unsure why, but the module itself reports version 20.100.00.00:
>
> [root at r1k1 sys] # cat
2016 Jun 01
0
Slow RAID Check/high %iowait during check after updgrade from CentOS 6.5 -> CentOS 7.2
...-back cache is NOT enabled for the drives on the hosts we haven't upgraded yet, but the speeds are similar (I kicked off a raid check on one of our CentOS 6 hosts as well, the window seems to be 150000 - 200000K/Sec on that host).
Kelly
On 2016-05-27, 9:21 AM, "Kelly Lesperance" <klesperance at blackberry.com> wrote:
>All of our Kafka clusters are fairly write-heavy. The cluster in question is our second-heaviest ? we haven?t yet upgraded the heaviest, due to the issues we?ve been experiencing in this one.
>
>Here is an iostat example from a host within the same cluster,...
2016 May 27
2
Slow RAID Check/high %iowait during check after updgrade from CentOS 6.5 -> CentOS 7.2
All of our Kafka clusters are fairly write-heavy. The cluster in question is our second-heaviest ? we haven?t yet upgraded the heaviest, due to the issues we?ve been experiencing in this one.
Here is an iostat example from a host within the same cluster, but without the RAID check running:
[root at r2k1 ~] # iostat -xdmc 1 10
Linux 3.10.0-327.13.1.el7.x86_64 (r2k1) 05/27/16 _x86_64_ (32 CPU)
2016 May 25
6
Slow RAID Check/high %iowait during check after updgrade from CentOS 6.5 -> CentOS 7.2
I?ve posted this on the forums at https://www.centos.org/forums/viewtopic.php?f=47&t=57926&p=244614#p244614 - posting to the list in the hopes of getting more eyeballs on it.
We have a cluster of 23 HP DL380p Gen8 hosts running Kafka. Basic specs:
2x E5-2650
128 GB RAM
12 x 4 TB 7200 RPM SATA drives connected to an HP H220 HBA
Dual port 10 GB NIC
The drives are configured as one large
2016 May 25
0
Slow RAID Check/high %iowait during check after updgrade from CentOS 6.5 -> CentOS 7.2
LSI/Avago?s web pages don?t have any downloads for the SAS2308, so I think I?m out of luck wrt MegaRAID.
Bounced the node, confirmed MPT Firmware 15.10.09.00-IT.
HP Driver is v 15.10.04.00.
Both are the latest from HP.
Unsure why, but the module itself reports version 20.100.00.00:
[root at r1k1 sys] # cat module/mpt2sas/version
20.100.00.00
On 2016-05-25, 3:20 PM, "centos-bounces at
2016 May 25
0
Slow RAID Check/high %iowait during check after updgrade from CentOS 6.5 -> CentOS 7.2
Already done ? they?re not being very helpful, as we don?t have a support contract, just standard warranty.
On 2016-05-25, 4:27 PM, "centos-bounces at centos.org on behalf of m.roth at 5-cent.us" <centos-bounces at centos.org on behalf of m.roth at 5-cent.us> wrote:
>Kelly Lesperance wrote:
>> LSI/Avago?s web pages don?t have any downloads for the SAS2308, so I think
2016 Jun 01
0
Slow RAID Check/high %iowait during check after updgrade from CentOS 6.5 -> CentOS 7.2
Software RAID 10. Servers are HP DL380 Gen 8s, with 12x4 TB 7200 RPM drives.
On 2016-06-01, 3:52 PM, "centos-bounces at centos.org on behalf of m.roth at 5-cent.us" <centos-bounces at centos.org on behalf of m.roth at 5-cent.us> wrote:
>Kelly Lesperance wrote:
>> I did some additional testing - I stopped Kafka on the host, and kicked
>> off a disk check, and it