Re: how can we help DSA save money

2013-07-22 Thread Philipp Kern
On 2013-07-21 08:09, Tollef Fog Heen wrote: The only realistic alternative to spending the money here would be if some company donated the equivalent in hardware. It's not really possible to code ourselves out of this one. Well, we could make snapshot store binary deltas. That would kill some

Re: how can we help DSA save money

2013-07-22 Thread Steven Chamberlain
Hi! On 2013-07-21 08:09, Tollef Fog Heen wrote: Backups is 8 x 4T Seagate Constellation drives. Bytemark is 24 x 4T Seagate Constellation drives. We get setup, hosting, power, etc donated, so that is not part of the cost there. Thanks; was this just a purchase of drives, or also a new

Re: how can we help DSA save money

2013-07-22 Thread Tollef Fog Heen
]] Steven Chamberlain Hi! On 2013-07-21 08:09, Tollef Fog Heen wrote: Backups is 8 x 4T Seagate Constellation drives. Bytemark is 24 x 4T Seagate Constellation drives. We get setup, hosting, power, etc donated, so that is not part of the cost there. Thanks; was this just a

Re: how can we help DSA save money

2013-07-22 Thread Steven Chamberlain
On 2013-07-22 14:50, Tollef Fog Heen wrote: There are practical problems with your suggestions, such as resizing the RAID taking a very long time when we add a new disk (you're looking at weeks of seriously reduced performance). That seems like a limitation of software, at one of the lower

Re: how can we help DSA save money

2013-07-22 Thread Steven Chamberlain
On 2013-07-22 15:49, Tollef Fog Heen wrote: It's not, it's a limitation of resizing a raid and that requiring about a billion seeks across the disk surface. I didn't realise it was hardware RAID. If for example it is possible to create multiple, smaller hardware RAIDs over time, then maybe all

Re: how can we help DSA save money

2013-07-22 Thread Tollef Fog Heen
]] Steven Chamberlain On 2013-07-22 14:50, Tollef Fog Heen wrote: There are practical problems with your suggestions, such as resizing the RAID taking a very long time when we add a new disk (you're looking at weeks of seriously reduced performance). That seems like a limitation of

Re: how can we help DSA save money

2013-07-22 Thread Tollef Fog Heen
]] Steven Chamberlain On 2013-07-22 15:49, Tollef Fog Heen wrote: It's not, it's a limitation of resizing a raid and that requiring about a billion seeks across the disk surface. I didn't realise it was hardware RAID. If for example it is possible to create multiple, smaller hardware

Re: how can we help DSA save money

2013-07-22 Thread Andrew M.A. Cater
On Mon, Jul 22, 2013 at 07:13:57PM +0200, Tollef Fog Heen wrote: ]] Steven Chamberlain On 2013-07-22 15:49, Tollef Fog Heen wrote: It's not, it's a limitation of resizing a raid and that requiring about a billion seeks across the disk surface. I didn't realise it was hardware

Re: how can we help DSA save money

2013-07-21 Thread Tollef Fog Heen
]] Steven Chamberlain On 09/07/13 10:40, Lucas Nussbaum wrote: I approve the purchase of additional storage for backups (~2300 EUR) and for our new hosting location at Bytemark, where snapshot.d.o will be moved soon (~£7000). May I ask some more details about this please; what

Re: how can we help DSA save money (was: bits from the DPL - June 2013)

2013-07-20 Thread Steven Chamberlain
Hello, On 09/07/13 10:40, Lucas Nussbaum wrote: I approve the purchase of additional storage for backups (~2300 EUR) and for our new hosting location at Bytemark, where snapshot.d.o will be moved soon (~£7000). May I ask some more details about this please; what kind/amount of storage can

Re: how can we help DSA save money (was: bits from the DPL - June 2013)

2013-07-20 Thread Ben Hutchings
On Sat, 2013-07-20 at 20:10 +0100, Steven Chamberlain wrote: Hello, On 09/07/13 10:40, Lucas Nussbaum wrote: I approve the purchase of additional storage for backups (~2300 EUR) and for our new hosting location at Bytemark, where snapshot.d.o will be moved soon (~£7000). May I ask