mathie's bits

I just start playing with EC2 today and these are some useful notes and observation. The small standard instance is quite slow, only scores 50 under Unixbench-WHT. Our quads E5405 are around 410+, Q9550 is at 650-750.

I also was confused about S3 versus EBS. The console management makes life much easier, but could be improved even further. This is what you do after attaching a EBS volume to an instance:

mkfs -t ext3 /dev/sdx
mkdir /mnt/data-store
mount /dev/sdx /mnt/data-store

For CentOS AMI (ami-0459bc6d), you need to run this to be able to customize the AMI and build your own

depmod -a
modprobe loop

As for performance, it’s pretty disappointing indeed. I ran Unixbench WHT 4.1 and small instance only got 51 (CentOS 5 32-bit) and the large instance got 111 (CentOS 5 64-bit). If you run an instance 24/7, it’s much more expensive for the same performance of a dedicated server. Our quad core servers usually get 600+ on the same test. The price you pay for EC2 is “on-demand”, meaning that you need to automate it to the point scaling up during peak is seamlessly and not having to run a single or even multiple instances all the time.

Download the Storage Manager RPM for your card model and architecture from their site http://www.adaptec.com/en-US/support/raid/

If you run /usr/StorMan/arcconf and get this error:

./arcconf: error while loading shared libraries: libstdc++.so.5: cannot open shared object file: No such file or directory

Do this

export LD_PRELOAD=/usr/StorMan/libstdc++.so.5

root@r StorMan]# ./arcconf 

  | UCLI |  Adaptec uniform command line interface
  | UCLI |  Version 5.30 (B17509)
  | UCLI |  (C) Adaptec 2003-2008
  | UCLI |  All Rights Reserved

 COPYBACK      | toggles controller copy back mode
 CREATE        | creates a logical device
 DATASCRUB     | toggles the controller background consistency check mode
 DELETE        | deletes one or more logical devices
 FAILOVER      | toggles the controller autotomatic failover mode
 SNAPSHOT      | creates a copy of a logical device
 GETCONFIG     | prints controller information
 GETLOGS       | gets controller log information
 GETSTATUS     | displays the status of running tasks
 GETVERSION    | prints version information for all controllers
 IDENTIFY      | blinks LEDS on device(s) connected to a controller
 KEY           | installs a Feature Key onto a controller
 MODIFY        | performs RAID Level Migration or Online Capacity Expansion
 RESCAN        | checks for new or removed drives
 ROMUPDATE     | updates controller firmware
 SETALARM      | controls the controller alarm, if present
 SETCONFIG     | restores the default configuration
 SETCACHE      | adjusts physical or logical device cache mode
 SETNAME       | renames a logical device given its logical device number
 SETPRIORITY   | changes specific or global task priority
 SETSTATE      | manually sets the state of a physical or logical device
 TASK          | performs a task such as build/verify on a physical or logical device

Get info

[root@r StorMan]# ./arcconf getconfig 1
Controllers found: 1
----------------------------------------------------------------------
Controller information
----------------------------------------------------------------------
   Controller Status                        : Optimal
   Channel description                      : SAS/SATA
   Controller Model                         : Adaptec 3405
   Controller Serial Number                 : 7C2102FD
   Physical Slot                            : 3
   Temperature                              : 32 C/ 89 F (Normal)
   Installed memory                         : 128 MB
   Copyback                                 : Disabled
   Background consistency check             : Disabled
   Automatic Failover                       : Enabled
   Defunct disk drive count                 : 0
   Logical devices/Failed/Degraded          : 1/0/0
   --------------------------------------------------------
   Controller Version Information
   --------------------------------------------------------
   BIOS                                     : 5.2-0 (12379)
   Firmware                                 : 5.2-0 (12379)
   Driver                                   : 1.1-5 (2409)
   Boot Flash                               : 5.2-0 (12379)
   --------------------------------------------------------
   Controller Battery Information
   --------------------------------------------------------
   Status                                   : Optimal
   Over temperature                         : No
   Capacity remaining                       : 99 percent
   Time remaining (at current draw)         : 3 days, 1 hours, 11 minutes

----------------------------------------------------------------------
Logical device information
----------------------------------------------------------------------
Logical device number 0
   Logical device name                      : raid 10
   RAID level                               : 10
   Status of logical device                 : Optimal
   Size                                     : 139798 MB
   Stripe-unit size                         : 256 KB
   Read-cache mode                          : Enabled
   Write-cache mode                         : Enabled (write-back)
   Write-cache setting                      : Enabled (write-back) when protected by battery
   Partitioned                              : Yes
   Protected by Hot-Spare                   : No
   Bootable                                 : Yes
   Failed stripes                           : No
   --------------------------------------------------------
   Logical device segment information
   --------------------------------------------------------
   Group 0, Segment 0                       : Present (0,0) 3LQ1330009747KV9
   Group 0, Segment 1                       : Present (0,1) 3LQ1SJ7009747KHQ
   Group 1, Segment 0                       : Present (0,2) 3LQ2TB3009746GYX
   Group 1, Segment 1                       : Present (0,3) 3L17LJ6009750G35


----------------------------------------------------------------------
Physical Device information
----------------------------------------------------------------------
      Device #0
         Device is a Hard drive
         State                              : Online
         Supported                          : Yes
         Transfer Speed                     : SAS 3.0 Gb/s
         Reported Channel,Device            : 0,0
         Reported Location                  : Connector 0, Device 0
         Vendor                             : SEAGATE
         Model                              : ST373455SS
         Firmware                           : 0002
         Serial number                      : 3LQ1323Y00009747KV9
         World-wide name                    : 5000C50004962A3
         Size                               : 70007 MB
         Write Cache                        : Enabled (write-back)
         FRU                                : None
         S.M.A.R.T.                         : No
      Device #1
         Device is a Hard drive
         State                              : Online
         Supported                          : Yes
         Transfer Speed                     : SAS 3.0 Gb/s
         Reported Channel,Device            : 0,1
         Reported Location                  : Connector 0, Device 1
         Vendor                             : SEAGATE
         Model                              : ST373455SS
         Firmware                           : 0002
         Serial number                      : 3LQ12SJ70747KHQ
         World-wide name                    : 5000C50004961D8
         Size                               : 70007 MB
         Write Cache                        : Enabled (write-back)
         FRU                                : None
         S.M.A.R.T.                         : No
      Device #2
         Device is a Hard drive
         State                              : Online
         Supported                          : Yes
         Transfer Speed                     : SAS 3.0 Gb/s
         Reported Channel,Device            : 0,2
         Reported Location                  : Connector 0, Device 2
         Vendor                             : SEAGATE
         Model                              : ST373455SS
         Firmware                           : 0002
         Serial number                      : 3LQ12T009746GYX
         World-wide name                    : 5000C500049604F
         Size                               : 70007 MB
         Write Cache                        : Enabled (write-back)
         FRU                                : None
         S.M.A.R.T.                         : No
      Device #3
         Device is a Hard drive
         State                              : Online
         Supported                          : Yes
         Transfer Speed                     : SAS 3.0 Gb/s
         Reported Channel,Device            : 0,3
         Reported Location                  : Connector 0, Device 3
         Vendor                             : SEAGATE
         Model                              : ST373455SS
         Firmware                           : 0002
         Serial number                      : 3LQ17LJ60000G35
         World-wide name                    : 5000C500049FE35
         Size                               : 70007 MB
         Write Cache                        : Enabled (write-back)
         FRU                                : None
         S.M.A.R.T.                         : No


Command completed successfully.