Re: Pig and pub! (Emergency social called for)

2010-01-15 Thread David Cantrell
On Thu, Jan 14, 2010 at 05:48:22PM +, Edmund von der Burg wrote: Might I suggest an emergency social on Thursday 28th Jan at a pub with easy parking nearish to Putney? The Antelope off Sloane Square would be a super choice - http://london.randomness.org.uk/wiki.cgi?Antelope,_SW1W_8EZ.

Re: SHA question

2010-01-15 Thread Andy Wardley
On 14/01/2010 17:41, Philip Newton wrote: Yes - you're missing the fact that in order to compute the differences (which it has to if it doesn't want to transfer the whole file), it has to read the entire file over the slow NFS link into your computer's memory in order to compare it with the

Re: SHA question

2010-01-15 Thread Roger Burton West
On Fri, Jan 15, 2010 at 08:16:09PM +, Andy Wardley wrote: My understanding[*] is that it computes a checksum for each block of a file and only transmits blocks that have different checksums. And to calculate the checksum on each block of the file, it has to, um, read each block of the

Re: SHA question

2010-01-15 Thread ian
On 15/01/2010 20:23, Roger Burton West wrote: On Fri, Jan 15, 2010 at 08:16:09PM +, Andy Wardley wrote: My understanding[*] is that it computes a checksum for each block of a file and only transmits blocks that have different checksums. And to calculate the checksum on each block of the

Re: SHA question

2010-01-15 Thread Ask Bjørn Hansen
On Jan 15, 2010, at 14:19, ian wrote: My understanding[*] is that it computes a checksum for each block of a file and only transmits blocks that have different checksums. And to calculate the checksum on each block of the file, it has to, um, read each block of the file... yes? Doesn't

Re: SHA question

2010-01-15 Thread Andy Wardley
On 15/01/2010 20:23, Roger Burton West wrote: And to calculate the checksum on each block of the file, it has to, um, read each block of the file... yes? Sorry, I missed this bit in Philip's message: if both source and destination are on a local file system I was thinking about remote