On Wed, Apr 11, 2012 at 10:48 AM, Keith Turner <[email protected]> wrote:
> How big is the partition? Are the same number of logger servers > running as tablet servers? > > > You can scan the metadata table to look for tablets that have alot of > write-ahead logs. I think the command below will show you how many > write-ahead logs each tablet has. Look for any tablets that have too > many. I think it should sort the tablets with the most tablets to the > top, but not positive. > > ./bin/accumulo shell -u root -p secret -e 'scan -t !METADATA -c > log' | cut -f 1 -d ' ' | uniq -c | sort -r -n > > I think the following command will show you how many active log each > logger has. This should be even. > > ./bin/accumulo shell -u root -p secret -e 'scan -t !METADATA -c > log' | cut -f 2 -d ' ' | cut -d ':' -f 2 | sort | uniq -c > > You can use the "flush -p" command in the shell to force data in > memory to disk and stop referencing write-ahead logs. Maybe execute > the commands above before and after flushing. > > Keith > > > Thanks for the replies. I read about the flush command in the docs but didn't make a connection between "memory" to the write ahead logs. Is that correct? Flush writes write ahead log data to hdfs? Thanks! -Kris
