How to change the chunklen of an existing bcolz carray?

sk

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Jul 16, 2017, 1:22:07 AM7/16/17

to bcolz

Hi,

I need to change the chunklen of an existing carray and wonder how that can be done.

Thank you!

sk

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Jul 16, 2017, 5:44:55 AM7/16/17

to bcolz

Found the solution:

new_carray = bcolz.carray(old_carray, expectedlen=16)

Still not sure why the new_carray has a chunklen of 4 afterwards

Francesc Alted

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Jul 16, 2017, 2:30:57 PM7/16/17

to Bcolz

Hi Sk,

I think you are after the `chunklen` argument:

https://bcolz.readthedocs.io/en/latest/reference.html#bcolz.carray

With that:

new_carray = bcolz.carray(old_carray, chunklen=XXX)

Please note that, in order to allow for reasonable compression ratios, chunklen should be in the 32KB ~ 4MB ballpark.

Francesc

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