At 02:36 PM 4/25/2007, you wrote:
On 4/25/07, Daevid Vincent <[EMAIL PROTECTED]> wrote:
A co-worker sent this to me, thought I'd pass it along here. We do tons of
failover/replication and would be eager to see mySQL implment the Google
patches in the stock distribution. If anyone needs mission critical,
scaleable, and failover clusters, it's Google -- so I have every
confidence
their patches are solid and worthy of inclusion...
This isn't surprising for Google. They've done the same thing to Linux.
I don't know much about Google's infrastructure these days, but several
years ago they had a server farm of about 2,000 identical x86 Linux machines
serving out search requests. Each machine had a local hard disk containing
the most recent copy of the search database.
So you're saying they had a MySQL database on the same machine as the
webserver? Or maybe 1 webserver machine and one MySQL machine?
I would have thought a single MySQL database could handle the requests from
25-50 webservers easily. Trying to maintain 2000 copies of the same
database requires a lot of disk writes. I know Google today is rumored to
have over 100,000 web servers and it would be impossible to have that many
databases in sync at all times.
Because of the volume of identical machines, reliability was critical, and
Google had a certain flavor of the Linux kernel that they had tested and
tuned.
I wouldn't be surprised to see Google do the same thing with MySQL. For use
internally, they would make some tweaks.
What are they using MySQL for? Any massively parallel deployments?
I believe Google is using MySQL for GMail.
Mike
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