diff --git src/main/docbkx/upgrading.xml src/main/docbkx/upgrading.xml index ca7a986..b7771bc 100644 --- src/main/docbkx/upgrading.xml +++ src/main/docbkx/upgrading.xml @@ -289,6 +289,22 @@ Successfully completed Log splitting 17:22:15 at Client_4_3_0.main(Client_4_3_0.java:63) +
+ Upgrading <code>META</code> to use Protocol Buffers (Protobuf) + When you upgrade from versions prior to 0.96, META needs to be converted to use protocol + buffers. This is controlled by the configuration option + , which is set to + true by default. Therefore, by default, no action is required + on your part. + The migration is a one-time event. However, every time your cluster starts, + META is scanned to ensure that it does not need to be + converted. If you have a very large number of regions, this scan can take a long + time. Starting in 0.98.5, you can set + to + false in hbase-site.xml, to disable + this start-up scan. This should be considered an expert-level and very + experimental setting. +