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Correct enable_content_md5 docs

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Both S3fsCurl::PutRequest and S3fsCurl::UploadMultipartPostSetup can
calculate and send Content-MD5 to the server.  Remove spurious comment
about large files and make man page and help consistent.
References #929.
This commit is contained in:
Andrew Gaul 2019-01-25 14:22:23 -08:00
parent fa287aeef7
commit 7d14ebaf09
2 changed files with 4 additions and 5 deletions
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6
doc/man/s3fs.1
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@ -220,10 +220,8 @@ But if you set the allow_other with this option, you can control permissions of
\fB\-o\fR nomultipart - disable multipart uploads
.TP
\fB\-o\fR enable_content_md5 ( default is disable )
verifying uploaded data without multipart by content-md5 header.
Enable to send "Content-MD5" header when uploading a object without multipart posting.
If this option is enabled, it has some influences on a performance of s3fs when uploading small object.
Because s3fs always checks MD5 when uploading large object, this option does not affect on large object.
Allow S3 server to check data integrity of uploads via the Content-MD5 header.
This can add CPU overhead to transfers.
.TP
\fB\-o\fR ecs ( default is disable )
This option instructs s3fs to query the ECS container credential metadata address instead of the instance metadata address.

3
src/s3fs_util.cpp
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@ -1231,7 +1231,8 @@ void show_help (void)
" nomultipart (disable multipart uploads)\n"
"\n"
" enable_content_md5 (default is disable)\n"
" - ensure data integrity during writes with MD5 hash.\n"
" Allow S3 server to check data integrity of uploads via the\n"
" Content-MD5 header. This can add CPU overhead to transfers.\n"
"\n"
" ecs\n"
" - This option instructs s3fs to query the ECS container credential\n"