cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Leonid Ilyevsky <>
Subject How to speed up data loading
Date Thu, 12 Jul 2012 20:42:30 GMT
I am loading a large set of data into a CF with composite key. The load is going pretty slow,
hundreds or even thousands times slower than it would do in RDBMS.
I have a choice of how granular my physical key (the first component of the primary key) is,
this way I can balance between smaller rows and too many keys vs. wide rows and fewer keys.
What are the guidelines about this? How the width of the physical row affects the speed of

I see that Cassandra is doing a lot of processing behind the scene, even when I kill the client,
the server is still consuming a lot of CPU for a long time.

What else should I look at ? Anything in configuration?

This email, along with any attachments, is confidential and may be legally privileged or otherwise
protected from disclosure. Any unauthorized dissemination, copying or use of the contents
of this email is strictly prohibited and may be in violation of law. If you are not the intended
recipient, any disclosure, copying, forwarding or distribution of this email is strictly prohibited
and this email and any attachments should be deleted immediately. This email and any attachments
do not constitute an offer to sell or a solicitation of an offer to purchase any interest
in any investment vehicle sponsored by Moon Capital Management LP ("Moon Capital"). Moon Capital
does not provide legal, accounting or tax advice. Any statement regarding legal, accounting
or tax matters was not intended or written to be relied upon by any person as advice. Moon
Capital does not waive confidentiality or privilege as a result of this email.

View raw message