Ceph

h1. Rados - improve ex-import functionality

h3. Summary

There are several problems and missing functionality with 'rados export/import' tools. 

h3. Owners

* Danny Al-Gaaf (Deutsche Telekom)

* Name (Affiliation)

* Name

h3. Interested Parties

* Marc Koderer ( Deutsche Telekom)

* Name (Affiliation)

* Name

h3. Current Status

h3. Detailed Description

The current implementation of 'rados export/import' has some issues:

* export/import speed is very slow

* export of large objects fails (e.g. big objects put via S3 into the cluster pool) due to limitation of extended attributes on the target filesystem

* depends on extended attributes support on local target filesystem

There are missing features:

* direct export from cluster1 and re-import in cluster2 in one run (could be faster and needed in some cases)

* verification, checksums

h3. Work items

h4. Coding tasks

* export performance:

** random shuffle "ExportLocalFileWQ export_object_wq" before start export should increase the performance (dalgaaf: already implemented and tested, need to rebase and review)

* extended attributes:

** use different approach than extended attributes or at least add option to export without

* direct export/import

** add functions and options to export/import in one run

* verification/checksums

** ...

h4. Build / release tasks

# Task 1

# Task 2

# Task 3

h4. Documentation tasks

# Task 1

# Task 2

# Task 3

h4. Deprecation tasks

# Support already exported pools to be imported again also with new implementation.