Some comments inline...
On Wed, Nov 3, 2010 at 1:44 PM, Jonathan Shook wrote:
> SSDs are not reliable after a (relatively-low compared to spinning
> disk) number of writes.
> They may significantly boost performance if used on the "journal"
> storage, but will suffer short lifetimes for highly-r
We are adding node into a cluster with some data. The new node is in
Bootstrapping mode for a long time, waiting for data to be streamed to it, but
the streaming seems to get stuck.
Mode: Normal
Streaming to: /10.110.10.10
/opt/choicestream/data/cassandra/data/Profile/stream/U_Profiles-4277-
around 1800 col/sec per node, 3kb columns, reading is the same.
Data will be deleted after 4 hours.
On 11/3/2010 5:00 PM, Terje Marthinussen wrote:
How high is high and how much data do you have (Cassandra disk usage).
Regards,
Terje
On 4 Nov 2010, at 04:32, Alaa Zubaidi wrote:
Hi,
we have
How high is high and how much data do you have (Cassandra disk usage).
Regards,
Terje
On 4 Nov 2010, at 04:32, Alaa Zubaidi wrote:
> Hi,
> we have a continuous high throughput writes, read and delete, and we are
> trying to find the best hardware.
> Is using SSD for Cassandra improves perform
Ah. Point taken on the random access SSD performance. I was trying to
emphasize the relative failure rates given the two scenarios. I didn't
mean to imply that SSD random access performance was not a likely
improvement here, just that it was a complicated trade-off in the
grand scheme of things.. T
Thanks for the reply.
I am having time out errors while reading.
I have 5 CFs but two CFs with high write/read.
The data is organized in time series rows, in CF1 the new rows are read
every 10 seconds and then the whole rows are deleted, While in CF2 the
rows are read in different time range sli
SSD will not generally improve your write performance very much, but they
can significantly improve read performance.
You do *not* want to waste an SSD on the commitlog drive, as even a slow HDD
can write sequentially very quickly. For the data drive, they might make
sense.
As Jonathan talks abo
SSDs are not reliable after a (relatively-low compared to spinning
disk) number of writes.
They may significantly boost performance if used on the "journal"
storage, but will suffer short lifetimes for highly-random write
patterns.
In general, plan to replace them frequently. Whether they are wort
Hi,
we have a continuous high throughput writes, read and delete, and we are
trying to find the best hardware.
Is using SSD for Cassandra improves performance? Did any one compare SSD
vs. HDD? and any recommendations on SSDs?
Thanks,
Alaa
and how to config it?
2010-11-03
zangds
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