On 06/06/2011 05:38, Jonathan Ellis wrote:
Index updates require read-before-write (to find out what the prior
version was, if any, and update the index accordingly). This is
random i/o.
Index creation on the other hand is a lot of sequential i/o, hence
more efficient.
So, the classic bulk load advice to ingest data prior to creating
indexes applies.
Thanks for the explanation!
--
Donal Zang
Computing Center, IHEP
19B YuquanLu, Shijingshan District,Beijing, 100049
zan...@ihep.ac.cn
86 010 8823 6018
