Message-
From: Shaun Cutts [mailto:sh...@cuttshome.net]
Sent: March-03-11 13:00
To: user@cassandra.apache.org
Subject: question about replicas dynamic response to load
Hello,
In our project our usage pattern is likely to be quite variable -- high for
a a few days, then lower, etc could
Hello,
In our project our usage pattern is likely to be quite variable -- high for a a
few days, then lower, etc could vary as much (or more) as 10x from peak to
non-peak. Also, much of our data is immutable -- but there is a considerable
amount of it -- perhaps in the single digit TBs.
This isn't quite true, I think. RandomPartitioner uses MD5. So if you had 10^16
rows, you would have a 10^-6 chance of a collision, according to
http://en.wikipedia.org/wiki/Birthday_attack ... and apparently MD5 isn't quite
balanced, so your actual odds of a collision are worse (though I'm not
There is/are lucandra/solandra: https://github.com/tjake/Lucandra
-- Shaun
On Feb 12, 2011, at 6:57 AM, Aklin_81 wrote:
I would like to text search for some of Entities/items stored in the
database through an AJAX powered application...Such that the user
starts typing and he can get
One thing that we're doing for (guaranteed) immutable data is to use MD5
signatures as keys... this will also prevent duplication, and it will allow
detection (if not correction) of bitrot at the app level easy.
On Feb 8, 2011, at 9:23 AM, Anand Somani wrote:
I should have clarified we have 3
Jonathan,
Thanks for your thoughts
On Sun, Feb 6, 2011 at 11:03 AM, Shaun Cutts sh...@cuttshome.net wrote:
What I think you should be doing is the following: open iterators on the
matching keys for each of the indexes; the inside loop would pick an
iterator at random, and pull a match
I'm a newbie here, but, with apologies for my presumptuousness, I think you
should deprecate SuperColumns. They are already distracting you, and as the
years go by the cost of supporting them as you add more and more functionality
is only likely to get worse. It would be better to concentrate
(not depending on histograms, etc). Does it sound
like a good idea?
-- Shaun
On Feb 6, 2011, at 12:15 AM, Jonathan Ellis wrote:
ColumnFamilyStore.scan
On Sat, Feb 5, 2011 at 10:32 PM, Shaun Cutts sh...@cuttshome.net wrote:
Thanks for the response!
So.. I *may* have a bug to report (at least I can
In theory, you should be able to do joins by creating an extra column in one
column family, holding the foreign key of the matching row in the other
family.
This assumes that the info you are joining on is available in both CFs (is not
some sort of functional transformation).
I have just
a row of which only 60-70
are required .
Shaun, I hope my above clarification has clarified things a bit. Yes,
the rows, of which I need to find common columns are known to me.
Thank you all,
Asil
On Mon, Feb 7, 2011 at 3:53 AM, Shaun Cutts sh...@cuttshome.net wrote:
In theory, you
Hello,
I'm wondering if cassandra is sensitive to the order of index expressions in
(pycassa call) get_indexed_slices?
If I have several column indexes available, will it attempt to optimize the
order?
Thanks,
-- Shaun
where the code that does this is... is it in
java.org.apache.cassandra.db.columniterator.IndexedSliceReader?
Thanks,
-- Shaun
On Feb 5, 2011, at 2:39 PM, Jonathan Ellis wrote:
On Sat, Feb 5, 2011 at 8:48 AM, Shaun Cutts sh...@cuttshome.net wrote:
Hello,
I'm wondering if cassandra
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