Did the Cassandra cluster go down or did you start getting failures from the
client when it routed queries to the downed node? The key in the client is to
keep working around the ring if the initial node is down.
--Joe
On Apr 9, 2011, at 12:52 PM, Vram Kouramajian wrote:
We have a 5
A few lines of Java in a partitioning or rack aware strategy might be able to
achieve this.
--Joe
--
Typed with big fingers on a small keyboard.
On Apr 8, 2011, at 13:17, Patrick Julien pjul...@gmail.com wrote:
We have a pilot project running where all our historical data
worldwide would
On Apr 3, 2011, at 2:22 PM, Drew Kutcharian wrote:
Thanks Tyler. Can you update the wiki with these answers so they are stored
there for others to see too?
Dude, it's a wiki.
FWIW we used Memcached for session data at Digg without any major issues. The
one thing we did end up doing to reduce the LRU on sessions was to modify the
slab size and put sessions in their own Memcached cluster. Probably not an
issue for you though.
+1 on Memcached.
On Feb 1, 2011, at
On Sep 1, 2010, at 1:42 PM, Peter Fales wrote:
I probably should have made it clear that I wasn't proposing this as
an official patch (as you point out, it's not general enough for
production use). I'm just looking for feedback on the concept (thanks!)
and thought it might possibly be
On Aug 28, 2010, at 12:29 PM, Mark wrote:
Also, what would be a good way of monitoring the health of the cluster?
We use Ganglia. I believe failover is usually built into clients. Not sure why
using HAProxy or LVS wouldn't be a good option though. I used to use it with
MySQL slaves with much
On Jul 9, 2010, at 1:16 PM, maneela a wrote:
Is there any way to mark cassandra node to keep it as just for replication
purpose and not to be as Primary for any data range in the ring?
I believe there is. This is what we're doing, but we do all of our writes via a
queue. Derek or Mike from
On Jul 6, 2010, at 6:18 PM, David Strauss wrote:
Then I'll tell my friend at Facebook to stick to topics he's qualified
to speak about. :-)
You might want to clarify that this advice applies to all topics of discussion
and not just Facebook related ones. ;)
--Joe
On Jun 29, 2010, at 12:44 PM, Anthony Molinaro wrote:
Maybe you need to modify the security groups to allow the ports to be
accessible from one to the other?
A likely better solution would be to look into the VPNCubed product which was
built specifically for this purpose. We're in the middle
On Jun 29, 2010, at 2:56 PM, Lenin Gali wrote:
Thanks Joe, I was hoping to hear from you. Can you pass me the SA contact at
AWS we would love to look in to it.
Just contact your account representative. They'll get you hooked up. They have
multiple SAs that help out account representatives.
A lot of the magic that Django brings to the table is derived from the ORM. If
you're skipping that then Pylons likely makes more sense.
--Joe
On Jun 20, 2010, at 5:08 PM, Charles Woerner charleswoer...@gmail.com wrote:
I recently looked into this and came to the same conclusion, but I'm not
This is largely FUD. Cassandra let's you choose how consistent you want writes
to be. The more consistency you choose, the slower the writes, but it's very
unlikely with high consistency that you'll lose data.
That being said, if you write with a consistency level of 0 then, yes, you
could
On May 14, 2010, at 12:46 PM, S Ahmed wrote:
For those with live apps, how has it been? (fb/digg/twitter people, would
love your experiences)
I didn't say it didn't require *any* administration. Just that it required
*minimal* administration. I'd say we spend about a quarter of an engineer
On Apr 25, 2010, at 11:40 AM, Mark Robson wrote:
For me an important difference is that Cassandra is operationally much more
straightforward - there is only one type of node, and it is fully redundant
(depending what consistency level you're using).
This seems to be an advantage in
On Apr 25, 2010, at 5:18 PM, Eric Hauser wrote:
Out of curiosity, are you planning on copying the data you store in
HBase/Hive into separate Hadoop cluster in a different data center or backing
up HDFS in some other manner? Redundancy isn't an issue within the cluster;
it's more a
On Apr 18, 2010, at 5:33 PM, S Ahmed wrote:
Obviously if you run asp.net on windows, it is probably a VERY good idea to
be running cassandra on a linux box.
Actually, I'm not sure this is true. A few people have found Windows performs
fairly well with Cassandra, if I recall correctly.
On Apr 3, 2010, at 1:53 PM, Benjamin Black wrote:
What specific features are you looking for to operate on EC2?
It seemed people weren't looking for features, but tools to help with the
management. The two things we've created that people might be interested in are:
1. An EC2-specific
On Apr 3, 2010, at 2:00 PM, Jonathan Ellis wrote:
I don't think Lazyboy exposes range queries [that is, iterating rows
whose keys you do not know ahead of time]. Pycassa does, though.
I think ieure's fork has itertools support that will let you do crazy iteration
stuff with it. I haven't
On Apr 3, 2010, at 2:54 PM, Benjamin Black wrote:
I'm pretty familiar with EC2, hence the question. I don't believe any
patches are required to do these things. Regardless, as I noted in
that ticket, you definitely do NOT need AWS credentials to determine
your availability zone. It is
On Mar 29, 2010, at 12:40 PM, Eric Hauser wrote:
BTW, does anyone from Digg patrol the list? I'm really interested in some
additional the implementation of atomic counters with ZooKeeper.
I know at least three Diggers patrol the list and one of them is a committer to
Cassandra. Last I
On Mar 20, 2010, at 2:53 AM, Lenin Gali wrote:
1. Eventual consistency: Given a volume of 5K writes / sec and roughly 1500
writes are Updates per sec while the rest are inserts, what kind of latency
can be expected in eventual consistency?
Depending on the size of the cluster you're not
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