Jeff Kubina wrote:
If you are doing a lot of ingesting via batch writes (which the Upsess implies), you might consider increasing tserver.walog.max.size to 2G instead of 1G (but doing so will cause the loss of more data if a tserver dies).
There is only dataloss if you lose each datanode which is hosting the blocks of that WAL. Losing a TabletServer does *not* imply data loss.
In the common case, increasing the size of the WAL will just increase the amount of time it takes to perform recovery of the WAL after a TabletServer dies.
The troubleshooting <https://github.com/apache/accumulo/blob/master/docs/src/main/asciidoc/chapters/troubleshooting.txt> documentation with accumulo is helpful in finding latency issues too.
- Josh
