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Posted to user@cassandra.apache.org by Dan Di Spaltro <da...@gmail.com> on 2009/11/23 18:03:02 UTC
get_key_range timeouts
I am trying to use get_key_range for an offline type job over about
18k keys and it keeps timing out. My current setup is 3x4G memory
machines with OPP and a replication factor of 2, and an rpctimeout of
180s. To combat this I've actually made the KeyCachedFraction 100
to see if this could help, and no matter how few of the key ranges I
want, I am unable to get any response from the system.
get_slice's work fine, among all the other commands, I just can't seem
to get get_key_range working. My current workload has few keys and
lots of columns.
Any advice to debug this would be appreciated.
--
Dan Di Spaltro
Re: get_key_range timeouts
Posted by Jonathan Ellis <jb...@gmail.com>.
On Mon, Nov 23, 2009 at 11:17 AM, Dan Di Spaltro
<da...@gmail.com> wrote:
> I haven't, is this common though?
Short answer? Yes. :)
> On Mon, Nov 23, 2009 at 9:07 AM, Jonathan Ellis <jb...@gmail.com> wrote:
>> Have you tried get_range_slice on trunk instead? get_key_range's
>> design is kind of fundamentally broken, so we're deprecating it in
>> favor of get_range_slice starting in 0.5. (gkr will still be in the
>> 0.5 series, but probably not after that.)
>>
>> On Mon, Nov 23, 2009 at 11:03 AM, Dan Di Spaltro
>> <da...@gmail.com> wrote:
>>> I am trying to use get_key_range for an offline type job over about
>>> 18k keys and it keeps timing out. My current setup is 3x4G memory
>>> machines with OPP and a replication factor of 2, and an rpctimeout of
>>> 180s. To combat this I've actually made the KeyCachedFraction 100
>>> to see if this could help, and no matter how few of the key ranges I
>>> want, I am unable to get any response from the system.
>>>
>>> get_slice's work fine, among all the other commands, I just can't seem
>>> to get get_key_range working. My current workload has few keys and
>>> lots of columns.
>>>
>>> Any advice to debug this would be appreciated.
>>>
>>> --
>>> Dan Di Spaltro
>>>
>>
>
>
>
> --
> Dan Di Spaltro
>
Re: get_key_range timeouts
Posted by Dan Di Spaltro <da...@gmail.com>.
I haven't, is this common though? Seems like this is a pretty bad to
have key_ranges time out like this... but you don't think this would
happen in get_range_slice?
Best,
On Mon, Nov 23, 2009 at 9:07 AM, Jonathan Ellis <jb...@gmail.com> wrote:
> Have you tried get_range_slice on trunk instead? get_key_range's
> design is kind of fundamentally broken, so we're deprecating it in
> favor of get_range_slice starting in 0.5. (gkr will still be in the
> 0.5 series, but probably not after that.)
>
> On Mon, Nov 23, 2009 at 11:03 AM, Dan Di Spaltro
> <da...@gmail.com> wrote:
>> I am trying to use get_key_range for an offline type job over about
>> 18k keys and it keeps timing out. My current setup is 3x4G memory
>> machines with OPP and a replication factor of 2, and an rpctimeout of
>> 180s. To combat this I've actually made the KeyCachedFraction 100
>> to see if this could help, and no matter how few of the key ranges I
>> want, I am unable to get any response from the system.
>>
>> get_slice's work fine, among all the other commands, I just can't seem
>> to get get_key_range working. My current workload has few keys and
>> lots of columns.
>>
>> Any advice to debug this would be appreciated.
>>
>> --
>> Dan Di Spaltro
>>
>
--
Dan Di Spaltro
Re: get_key_range timeouts
Posted by Jonathan Ellis <jb...@gmail.com>.
Have you tried get_range_slice on trunk instead? get_key_range's
design is kind of fundamentally broken, so we're deprecating it in
favor of get_range_slice starting in 0.5. (gkr will still be in the
0.5 series, but probably not after that.)
On Mon, Nov 23, 2009 at 11:03 AM, Dan Di Spaltro
<da...@gmail.com> wrote:
> I am trying to use get_key_range for an offline type job over about
> 18k keys and it keeps timing out. My current setup is 3x4G memory
> machines with OPP and a replication factor of 2, and an rpctimeout of
> 180s. To combat this I've actually made the KeyCachedFraction 100
> to see if this could help, and no matter how few of the key ranges I
> want, I am unable to get any response from the system.
>
> get_slice's work fine, among all the other commands, I just can't seem
> to get get_key_range working. My current workload has few keys and
> lots of columns.
>
> Any advice to debug this would be appreciated.
>
> --
> Dan Di Spaltro
>