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location Australia
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visits member for 3 years, 7 months
seen Dec 18 at 4:50

I'm a freelance Enterprise IT consultant based in Perth, Australia.

I currently specialise in server consolidation, performance analysis, storage design and configuration, system monitoring, and high-availability architectures. In the past I've been a programmer, system administrator, systems architect, and vendor liaison.

I have designed, configured, troubleshot, programmed on and managed systems including several flavours of Solaris, Linux, VMware, and Windows Server. I have also designed, configured and integrated disk storage from Engenio, Sun, HDS, and EMC for use in heterogeneous environments, and tape storage from StorageTek (now Oracle), including backup servers and petabyte-scale HSM systems.

In 2008 I completed an MBA at the University of Western Australia in which I received several awards and prizes. With the MBA I gained an understanding of business requirements, project management, market analysis and product lifecycles.

If you'd like to enquire about engaging me for a project, please get in touch at tom.shaw<at>solidsystems.com.au.


Dec
11
comment Read performance of old LTO-2 tape
As per the detail I put in the question, the time is consumed by the device-side IO latency of each read. Note the iostat output shows a high %b but zero %w.
Dec
11
comment Read performance of old LTO-2 tape
They were written with a gzip stream piped into dd bs=10240 of=/dev/rmt/1lbn
Dec
11
comment Read performance of old LTO-2 tape
Unfortunately this doesn't help. I actually tried using mbuffer by Thomas Maier-Komor for similar reasons. However, the bottleneck appears to be somewhere else.
Dec
11
comment Read performance of old LTO-2 tape
How could this be faster than dd to /dev/null?
Dec
11
asked Read performance of old LTO-2 tape
Oct
22
answered Refresh ipfilter configuration while keeping state
Oct
22
asked Refresh ipfilter configuration while keeping state
Sep
24
awarded  Autobiographer
Aug
29
comment Having public IP addresses for computers in private network
Updated to say "built-in security of a private address". I agree that NAT itself doesn't provide security. The point I was making is that a public address is accessible from the internet unless it is blocked (e.g. a firewall), whereas a private address is not accessible from the internet unless you specifically make it accessible (e.g. permissive NAT or port forwarding).
Aug
29
revised Having public IP addresses for computers in private network
Removed "built-in security of NAT" because NAT itself doesn't provide the security
Aug
29
awarded  Nice Answer
Aug
28
awarded  Popular Question
May
24
awarded  Yearling
May
24
awarded  Yearling
Sep
22
comment ZFS (NexentaStor) and 4k Advanced Format Partition Alignment
Thanks @PatJames - it looks like solarismen.de has changed to solaris.kuehnke.de, so I have updated the links
Sep
22
revised ZFS (NexentaStor) and 4k Advanced Format Partition Alignment
Updated the Solarismen links
May
24
awarded  Yearling
Mar
11
answered LDAP auth in Ubuntu PAM?
Nov
28
accepted Filesystem space available using SNMP
Nov
28
asked Filesystem space available using SNMP