Glance

Bad math interpreting rbd_store_chunk_size leads to wrong chunk size and slow upload of images

Bug #1390386 reported by Erik McCormick
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Glance
Invalid
Undecided
David Wilde

Bug Description

Setting rbd_store_chunk_size -= 8 leads to an actual chunk size of 8 KB not 8 MB. The result is incredibly slow uploads to the RBD backend.

2014-11-06 11:42:30.619 6986 DEBUG glance_store._drivers.rbd [-] writing chunk at offset 8208 add /usr/lib/python2.7/site-packages/glance_store/_drivers/rbd.py:365
2014-11-06 11:42:30.626 6986 DEBUG glance_store._drivers.rbd [-] writing chunk at offset 16416 add /usr/lib/python2.7/site-packages/glance_store/_drivers/rbd.py:365
2014-11-06 11:42:30.633 6986 DEBUG glance_store._drivers.rbd [-] writing chunk at offset 24624 add /usr/lib/python2.7/site-packages/glance_store/_drivers/rbd.py:365
2014-11-06 11:42:30.638 6986 DEBUG glance_store._drivers.rbd [-] writing chunk at offset 32832 add /usr/lib/python2.7/site-packages/glance_store/_drivers/rbd.py:365

/usr/lib/python2.7/site-packages/glance_store/_drivers/rbd.py: Line 192

self.chunk_size = chunk * (1024 ^ 2)

should be either

self.chunk_size = chunk * (1024 ** 2)

or

self.chunk_size = chunk * units.Mi

Erik McCormick (emccormickva)
tags: added: low-hanging-fruit
David Wilde (dave-wilde)
Changed in glance:
assignee: nobody → David Wilde (david-wilde-rackspace)
Revision history for this message
David Wilde (dave-wilde) wrote :

Duplicate of #1370247

Changed in glance:
status: New → Invalid
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