Hi all,
I'm a novice in terms of MySQL cluster.
Anybody could tell me if, when I proceed a structural modification (such as
create table or alter table), the cluster ensures the replication of the
modification fidelly into the other machines?
(i.e, is it warranted atomic and uniform replication?)
Thank you since now
FM
-----Mensagem original-----
De: pekka@stripped [mailto:pekka@stripped]
Enviada em: quinta-feira, 10 de novembro de 2005 20:45
Para: Adam Dixon; Simon Garner; Jason Williams
Cc: cluster@stripped
Assunto: Re: Disk-based storage...5.1?
> Which is totally unclear as to exactly how it will work. eg is it whole
> tables only on disk, partitions of tables etc.
Given _attributes_ on disk. No indexed attributes in 5.1.
In particular PK must be in memory.
> More importantly, will there be a significant performance penalty?
Disk pages are cached (like in any real rdbms). If cache hit ratio
is good, performance should be close to memory data.
> ...Performance was a lot poorer than InnoDB at the time.
InnoDB is within same process (mysqld). NDB is networked.
--
Pekka Nousiainen, Software Engineer
MySQL AB, www.mysql.com
pekka@stripped +46 (0) 73 068 4978
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