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How we can associate user defined meta data to an ECS object? Any size limitation?
We are developing a solution where I need to enter nearly 40 information about an object (name, age, skill, etc). How I can enter these values while uploading an object? Is there any size limitation for user defined meta data? As per S3 documents it is 2KB. Is this applicable to ECS object?
Thanks, Santhosh Peter
JasonCwik
281 Posts
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May 3rd, 2016 09:00
Hi Santhosh,
We allow up to 8kB of HTTP headers in a request. This is a pretty standard value to ensure we don't get DoS and ensures compatibility with Internet proxy servers. This limit includes the standard headers like Authentication, Content-Type, Content-Length, etc. For metadata be sure to include both the name and the value. So, the limit depends a little on the length of the name as well since "name=Jason" would come across like:
x-amz-meta-name: Jason\r\n
So, 2kB is a pretty "safe" limit, but depending on the lengths of your names you can likely squeeze some more in there.
ssss-i_QXD
13 Posts
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May 4th, 2016 05:00
Hi Jason,
Thanks for the answer. Is there any tool which gives size of the metadata?
Thanks, Santhosh
JasonCwik
281 Posts
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May 12th, 2016 19:00
Not directly. However, you could use a tool like Fiddler or Charles Proxy to capture the requests on the wire and see how big the headers are (including the PUT /bucket/key line at the top).