Pe 22.02.2012 17:02, Haijia Zhou a scris:
Thanks for the suggestion. I did use List<Delete> with size 1000, actually the
performance was not that different from deleting one row at a time.
I investigated HRegion.delete() method, my understanding is that when you call
delete() to delete a row, it's actually going to delete all the column families
for that row first, meaning it'll put tombstone to each family column.
In my case each row has 5 family columns, that means each delete will result in
putting 5 tombstones to the row, I am thinking that could be the reason why
delete is so slow.
I am just wondering if there's anyway or tools we can profile a hbase
application to measure the time taken on each individual methods.
Haijia
Hello Haijia,
Try jetm http://jetm.void.fm/ for that kind of work. If you configure it
using Spring Proxy AOP you can enable/disable performance monitoring
from a config file.
Cheers,
--
Ioan Eugen Stan
http://ieugen.blogspot.com
