age -
From: "Colin P. McCabe"
To: hdfs-dev@hadoop.apache.org
Sent: Thursday, January 8, 2015 2:43:29 PM
Subject: Re: HDFS 2.6.0 upgrade ends with missing blocks
Hi dlmarion,
In general, any upgrade process we do will consume disk space, because
it's creating hardlinks and
Hi dlmarion,
In general, any upgrade process we do will consume disk space, because
it's creating hardlinks and a new "current" directory, and so forth.
So upgrading when disk space is very low is a bad idea in any
scenario. It's certainly a good idea to free up some space before
doing the upgrad
I went back and read through the comments in HDFS-6482 and found that the
restrictions (question #2 below) have already been documented at
https://wiki.apache.org/hadoop/FAQ#On_an_individual_data_node.2C_how_do_you_balance_the_blocks_on_the_disk.3F
I will update HDFS-1312 with this information
