Hi Jacek,
From what I understood, Shard is supposed to do the request
dispatching. Now if you want the availability part to be handled by
Sequoia, you can use a RAIDb-1 Sequoia cluster (full replication) for
each Shard partition (and Sequoia will just do the load balancing among
replicas of the same partition).
If you really want to do the row-based partitioning in Sequoia then you
will have to implement your own load balancer or integrate parts of the
Shard logic into a Sequoia load balancer.
Hope this helps,
Emmanuel
I want to create some basic application which will use shards. I mean
the application which will use many real databases partitioned in some
way (by range, hash etc.). So I have one table which reside in
multiple databases, but in one database I have only a part of rows. I
want to use Sequoia as a request dispatcher. It will be responsible
for select what database will be used to a given query. I read the
documentation and didnt find similar solution. There is only RAIDb-0
which split database by tables. But I want to split rows in tables
instead. How can I implement this using Sequoia? Should I implement my
own load balancer?
--
Emmanuel Cecchet - Research scientist
EPFL - LABOS/DSLAB - IN.N 317
Phone: +41-21-693-7558
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