When the checkpointing starts, the primary namenode starts a new edits
file. During the checkpointing process will the namenode go into safe
mode? According
to the Hadoop - The Definitive Guide
The schedule for checkpointing is controlled by two configuration
parameters. The secondary namenode
Praveen,
On 08-Jan-2012, at 9:13 AM, Praveen Sripati wrote:
When the checkpointing starts, the primary namenode starts a new edits file.
During the checkpointing process will the namenode go into safe mode?
No.
During the time the NN stops writing to the old edits file and creates a
new edit file, will the file modifications work or not? Curious, how this
is handled in the code.
Praveen
On Sun, Jan 8, 2012 at 9:34 AM, Harsh J ha...@cloudera.com wrote:
Praveen,
On 08-Jan-2012, at 9:13 AM, Praveen
Praveen,
You just answered yourself. If newer edits (from checkpoint-init) are being
made to go to a newer edits file, then why do you imagine there'll be a problem
with file modifications? To remind, the FS structure is also held in memory and
reflects the current state. Checkpointing is done
