Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
--- Lars Ellenberg <Lars.Ellenberg at linbit.com> wrote: > / 2006-05-10 09:39:12 -0700 > \ Carson Gaspar: > > --On Wednesday, May 10, 2006 6:32 PM +0200 Lars > Ellenberg <Lars.Ellenberg at linbit.com> wrote: > > > > >but then again, once we implement the online > > >verification, we would _need_ to have this > initial > > >sync, because the drives _have_ to be bitwise > identical > > >(that's one of our "guarantees", after all). > > > > Actually, no - you don't have to do a network > sync. > > You can just write zeros on both sides. > > Oh? That's news! Tell me more :) > > if someone wants to do that, he can of course do > that. thats maybe > usefull if you have smallish, fast storage but > slowish network. Well, large storage, but slow net, nevertheless not an enterprise situation for me, these are my home pcs, one is a 400MHz pentium with a 10baseT! But I don't see how the size matters, only the relative speed of your disk writes to your network connection. A larger disk means not just more zeroing, but more syncing too! The zeroing solution would still win and by more when things get bigger. Don't forget that most people try several onfigurations before they end up with their final setup. This is where saving time could be very valuable. Some people may even dish the whole product just because it takes too long to setup in a new config. First I needed to figure out how drbd worked, it took me 4 hours to sync my 5G partition (*1). I plan on having a larger partition, but I thought that I would test things with a small 5G partition first to see if I understood how drbd worked. *1: There very well could be something wrong with my setup, I noticed that for the first hour throuput was about 600KB/s but that after that it dropped to about 300KB/s and the last hour it was in the 200s...strange. > I think typically you rather have largish raid5 > backend, > and a dedicated GigE link. > Bottleneck is the storage box. so what. Maybe that is what it was intially designed for (but maybe not, companies with money would just buy shared storage!) I would not dismiss the idea that simple home users want high availability too. Computers are becoming a very important part of mine and other's home lives too. While I would not suggest sacrificing capabilities on the enterprise end, I believe that a product won't truly be enterprise ready unless it can be effectively used by the masses also... more users, more testing. This kind of speedup would make joe home hacker much more likely to try drbd out and do weird stuff and possibly expose new corner cases where drbd could use improvement. > Nothing of this is likely to appear in drbd 0.7, > though. Fair enough. :) -Martin __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com