openstack/python-glanceclient
Code Issues Proposed changes

Bump the CHUNKSIZE to use CPU more efficiently

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The chunk size used for downloading images was 64KiB for some time. That
is okay for relatively small images but the client side of CPU can be a
bottleneck especially for large images. Bump the default chunk size from
64KiB to 1MiB so we can use the client side CPU more efficiently.

[64KiB chunk size - current]
INFO cinder.image.image_utils Image download 1907.35 MB at 68.61 MB/s
-> ~ 549 Mbps

[1MiB chunk size - patched]
INFO cinder.image.image_utils Image download 1907.35 MB at 132.10 MB/s
-> 1,057 Mbps

Closes-Bug: #2020139
Change-Id: I8b6e19621fc989526b02319d88fcfde88a17eee0
(cherry picked from commit 7d78cc4b9d)
This commit is contained in:
Nobuto Murata
2023-05-19 09:36:49 +09:00
committed by Rajat Dhasmana
parent d94f563363
commit 3a2ef8b105
1 changed files with 1 additions and 1 deletions
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2
glanceclient/common/http.py
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@@ -40,7 +40,7 @@ osprofiler_web = importutils.try_import("osprofiler.web")
LOG = logging.getLogger(__name__)
USER_AGENT = 'python-glanceclient'
CHUNKSIZE = 1024 * 64 # 64kB
CHUNKSIZE = 1024 * 1024 # 1MiB
REQ_ID_HEADER = 'X-OpenStack-Request-ID'
TOKEN_HEADERS = ['X-Auth-Token', 'X-Service-Token']