[DRBD-user] Does DRDB do 'intelligent' mirroring?

[Alan Robertson]

Steve Purkis wrote:
> On Sep 17, 2004, at 15:48, Alan Robertson wrote:
> 
>> Steve Purkis wrote:
>>
>>> On Sep 17, 2004, at 14:26, Alan Robertson wrote:
>>>
>>>> [snip]
>>>>
>>>> That's easy.
>>>>
>>>> It does intelligent resync.  In fact, it will never do a full resync 
>>>>  of two nodes (except the first time).
>>>>
>>>> In fact, I believe it does a better job of doing intelligent resync  
>>>> than "Fast RAID-1".  For details, see this article:
>>>>     http://www.drbd.org/fileadmin/drbd/publications/drbd-activity- 
>>>> logging_v6.pdf
>>>>
>>> Thanks!
>>> PS: have just been blind, or is this not on the website?  If not, 
>>> then  it's a real good idea to put it up there...
>>
>>
>> Perhaps you're blind -- note the URL?  There's a link called 
>> publications on the main page IIRC ;-)
> 
> 
> Yeah, saw that after the fact - blind I must be ;-)
> 
> But seriously, for newbies, the fact that drdb-0.7 does rapid 
> replication using a metadisk could be what pushes them to trial it (as 
> in our case ;-).  Maybe it should be plastered on the 'Start' page?

It's done rapid replication before in many cases.  0.7 is a big 
improvement, obviously ;-)

And, it fully understands the "which copy is best" issue and deals with it 
correctly.  To my knowledge it's the only OSS solution which does this right.

But, I think this is a good suggestion.  Phillip?


-- 
     Alan Robertson <alanr at unix.sh>

"Openness is the foundation and preservative of friendship...  Let me claim 
from you at all times your undisguised opinions." - William Wilberforce