Re: [Discuss] lvm snapshot cloning

2011-10-26 Thread markw
On Tue, Oct 25, 2011 at 11:20 PM, ma...@mohawksoft.com wrote: Obviously, there are pros and cons to various approaches. You approach is only faster if you know that the file in questions was recently modified. If that is the case, you lucked out. What happens if the source of the

Re: [Discuss] lvm snapshot cloning

2011-10-26 Thread Matt Shields
On Tue, Oct 25, 2011 at 10:16 PM, Richard Pieri richard.pi...@gmail.comwrote: On Oct 25, 2011, at 7:51 PM, ma...@mohawksoft.com wrote: The snapshot has no effect on the master, and yes, we've already said and we already know it is a weakness in LVM that if you don't extend your snapshots

Re: [Discuss] lvm snapshot cloning

2011-10-26 Thread markw
On Oct 25, 2011, at 11:20 PM, ma...@mohawksoft.com wrote: Actually, in LVM 'a' and 'b' are completely independent, each have their own copy of the COW data. So, if 'a' gets nuked, 'b' is fine, and vice virca. Rather, this is how LVM works *because* of this situation. If LVM supported

Re: [Discuss] Recommendation on Gigabit ISP for small business

2011-10-26 Thread Rich Braun
Hsuan-Yeh Chang hsuan...@gmail.com asked: Can anyone recommend an ISP (optical fiber) for 1-10 Gbps capability, particularly servicing small businesses in the Boston metro area? Cogent (www.cogentco.com) and XO (www.xo.com) were the two I used most recently, serving sites in Kendall Square and

Re: [Discuss] lvm snapshot cloning

2011-10-26 Thread Dan Ritter
On Tue, Oct 25, 2011 at 11:20:40PM -0400, ma...@mohawksoft.com wrote: Data point: It takes ~19 hours to restore 7.5TB from enterprise-class Tivoli Storage Manager over 1GB Ethernet to a 12x1TB SATA (3Gb/s) RAID 6 volume. I had to do it this past spring after the RAID controller on that

Re: [Discuss] lvm snapshot cloning

2011-10-26 Thread Richard Pieri
On Wed, Oct 26, 2011 at 8:26 AM, ma...@mohawksoft.com wrote: 400GB/hour? I doubt that number, but ok. It is still close to three hours. Doubt if you want but I did it last spring. 7.5TB -- ~7500GB -- restored over 19 hours and change. That's 400GB/hour average throughput. Over a network.

[Discuss] A couple of git questions regarding tags

2011-10-26 Thread Jerry Feldman
I've been tagging my commits, and now I want to use that in my code. The 'git describe' command does this nicely: In my sandbox I get '1.0.3-1-gf9a4796', but if I push (actually pull) that into another repository I get '1.0.3'. I would like to be able to display the version as well as the commit

Re: [Discuss] A couple of git questions regarding tags

2011-10-26 Thread Jerry Feldman
On 10/26/2011 01:23 PM, Jerry Feldman wrote: I've been tagging my commits, and now I want to use that in my code. The 'git describe' command does this nicely: In my sandbox I get '1.0.3-1-gf9a4796', but if I push (actually pull) that into another repository I get '1.0.3'. I would like to be

Re: [Discuss] lvm snapshot cloning

2011-10-26 Thread Edward Ned Harvey
From: ma...@mohawksoft.com [mailto:ma...@mohawksoft.com] If you can get more than 160MB/s (sustained) on anything other than exotic hardware, I'd be surprised. 1Gbit/sec per disk sustained is currently not possible with COTS hardware that is available. Transfer rate is not sustained, and

Re: [Discuss] lvm snapshot cloning

2011-10-26 Thread Dan Ritter
On Wed, Oct 26, 2011 at 03:18:06PM -0400, Edward Ned Harvey wrote: From: ma...@mohawksoft.com [mailto:ma...@mohawksoft.com] If you can get more than 160MB/s (sustained) on anything other than exotic hardware, I'd be surprised. 1Gbit/sec per disk sustained is currently not possible with

Re: [Discuss] Verizon ADSL and port blocking

2011-10-26 Thread Bill Horne
On Wed, 2011-10-26 at 11:30 -0400, Gregory Boyce wrote: Turn off any local firewalling, and go to http://nmap-online.com/ After a quick scan, you will likely see a mix of open, closed and filtered ports. Anything open or filtered should be fine to use. Anything filtered is not. I got

Re: [Discuss] Verizon ADSL and port blocking

2011-10-26 Thread Tom Metro
Bill Horne wrote: If there are other ways to scan my IP, please tell m how. ShieldsUP https://www.grc.com/x/ne.dll?bh0bkyd2 -Tom -- Tom Metro Venture Logic, Newton, MA, USA Enterprise solutions through open source. Professional Profile: http://tmetro.venturelogic.com/