Vladimir Ozerov created IGNITE-3343:
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Summary: IGFS: Do not query secondary file system properties
during create/append/mkdirs.
Key: IGNITE-3343
URL: https://issues.apache.org/jira/browse/IGNITE-3343
Project: Ignite
Issue Type: Improvement
Components: IGFS
Affects Versions: 1.6
Reporter: Vladimir Ozerov
Assignee: Vladimir Ozerov
Priority: Critical
Fix For: 1.7
Currently when we create something in a secondary file system, we perform
additional calls to the secondary file system to get file/directory info. This
significantly slows down structural operations, while usually it is not really
needed in most cases.
We should do the following:
1) Do not write modification time, access time and properties for DUAL entries.
Instead, we should propagate "info" and "listFiles" calls to secondary file
system right away.
2) For {{create()}} we do not need length, as the file is either created from
scratch, or truncated.
3) For {{append()}} we need to know current length, so the second file system
call appears to be inevitable.
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