On 06/20/2016 06:53 PM, Jiří Činčura wrote:
> Can this be somewhat requested also by isc_info_firebird_version or
> similar?
>
This is requested by isc_version() in legacy API and
IUtil::getFbVersion() in new one.
--
A
Can this be somewhat requested also by isc_info_firebird_version or
similar?
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Mgr. Jiří Činčura
Independent IT Specialist
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What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic
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On 06/18/2016 06:10 PM, Jiří Činčura wrote:
>> Do you receive pflag_compress set in accept->p_acpt_type? You should
>> check this value to decide use compression later or not.
> Yes, I do. I receive 261, which is ptype_lazy_send | pflag_compress, if
> I'm not mistaken.
>
> Not sure where to look n
Ahh, looks like I found the problem. The DeflateStream in .NET is
producing really raw deflate, while Firebird want's the zlib header.
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Mgr. Jiří Činčura
Independent IT Specialist
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What NetFlow Analyzer can do for yo
OK, I'm successfully writing data to server for op_attach - checked on
network level.
Just "for fun" I tried to write uncompressed data, as it would without
compression. In that case the server closes connection with me during
writing of DPB for op_attach.
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Mgr. Jiří Činčura
Independent IT Spe
> Do you receive pflag_compress set in accept->p_acpt_type? You should
> check this value to decide use compression later or not.
Yes, I do. I receive 261, which is ptype_lazy_send | pflag_compress, if
I'm not mistaken.
Not sure where to look next.
> As far as I know no such flag exists.
> Try
On 06/17/2016 11:54 AM, Jiří Činčura wrote:
> Hi,
>
>> Yes. May be the only detail is that zlib may compress data in slightly
>> different ways. In our case data compressed not as a set of packets -
>> the stream is compressed as a whole with flashes in the end of each
>> packet.
> Can i turn on so
Hi,
> Yes. May be the only detail is that zlib may compress data in slightly
> different ways. In our case data compressed not as a set of packets -
> the stream is compressed as a whole with flashes in the end of each
> packet.
Can i turn on some flag on Firebird to see whether it's happy with
On 05/25/2016 08:42 PM, Jiří Činčura wrote:
>> are compressed. I can't imagine a case where it creates problems, and
>> therefore separate in/out setup looks just like unneeded complication
>> for both protocol and user environment.
> So how do I know whether I should or shouldn't (de)compress the
> Client controls compression in both directions, not separately in/out.
> Must say that in most cases (i.e. LAN) compression makes almost no
> visible effect regarding both data exchange speed (network is too fast)
> and CPU load (compression of relatively small data volume, passed over
> the
On 05/25/2016 05:31 PM, Jiří Činčura wrote:
>> Yes. May be the only detail is that zlib may compress data in slightly
>> different ways. In our case data compressed not as a set of packets -
>> the stream is compressed as a whole with flashes in the end of each
>> packet.
> Great. I hope the .NET'
> As expected - what a reason to place implementation details in user
> documentation?
No, I agree. I was just trying to express I did my homework before
asking. :)
> Yes. May be the only detail is that zlib may compress data in slightly
> different ways. In our case data compressed not as a se
On 05/25/2016 02:41 PM, Jiří Činčura wrote:
> Hi *,
>
> is there any more information about %subj%? I've found only
> README.wire.compression.html and CORE-733. Not much implementation
> details there.
As expected - what a reason to place implementation details in user
documentation?
> Or is it
I'll look this! Thanks!
On 01/12/2014 16:30, Vlad Khorsun wrote:
01.12.2014 19:41, Fabiano Kureck - Desenvolvimento SCI wrote:
How can I enable wire compression? I downloaded Firebird today, and not found
any documentation about that (That I can found).
Windows build was committed just tod
01.12.2014 19:41, Fabiano Kureck - Desenvolvimento SCI wrote:
> How can I enable wire compression? I downloaded Firebird today, and not found
> any documentation about that (That I can found).
Windows build was committed just today, don't hurry ;) Try next snapshot
build
and look for doc\READM
Title: Re: [Firebird-devel] Wire compression and zlib on Windows
Afaik, it will be available starting from Beta 2.
[]s
Carlos
http://www.firebirdnews.org
FireBase - http://www.FireBase.com.br
How can I enable wire compression? I downloaded Firebird today, and not found any documentation
How can I enable wire compression? I downloaded Firebird today, and not
found any documentation about that (That I can found).
Thanks.
On 01/12/2014 11:47, Vlad Khorsun wrote:
28.11.2014 13:39, Vlad Khorsun wrote:
Done.
Regards,
Vlad
--
28.11.2014 13:39, Vlad Khorsun wrote:
Done.
Regards,
Vlad
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On 11/28/14 19:13, Carlos H. Cantu wrote:
> AP> What pages? That's about _wire_ compression, not database. It's turned
> AP> off by default, and it's supposed that reasonable people use it only for
> AP> WAN connections where reducing size (and specially number) of packages
> AP> is expected to lea
AP> What pages? That's about _wire_ compression, not database. It's turned
AP> off by default, and it's supposed that reasonable people use it only for
AP> WAN connections where reducing size (and specially number) of packages
AP> is expected to lead to better performance.
Alex, can we enable/disa
Jim,
> Has anyone done any performance studies on zlib?
I never trust benchmarks which haven't run on my own, but slide 8 here:
http://www.slideshare.net/Hadoop_Summit/kamat-singh-june27425pmroom210cv2
is a good fit regarding cpu time vs. compression ratio.
Working with Cassandra for the last t
On 11/28/14 18:29, James Starkey wrote:
> Has anyone done any performance studies on zlib? Decompression is OK, but
> compression is very, very CPU intensive. I did a study a while back to
> investigate using zlib for blobs. The short answer is that it was much,
> much faster to read the extra p
Has anyone done any performance studies on zlib? Decompression is OK, but
compression is very, very CPU intensive. I did a study a while back to
investigate using zlib for blobs. The short answer is that it was much,
much faster to read the extra pages than pay for zlib compression and
decompres
On 28/11/2014 11:02, Vlad Khorsun wrote:
> 28.11.2014 14:50, Adriano dos Santos Fernandes wrote:
>> On 28/11/2014 09:39, Vlad Khorsun wrote:
>>> Hi all.
>>>
>>> Recently wire compression was implemented by Alex. It uses well known
>>> zlib
>>> library. On Linux zlib could be installed as a
28.11.2014 14:50, Adriano dos Santos Fernandes wrote:
> On 28/11/2014 09:39, Vlad Khorsun wrote:
>> Hi all.
>>
>> Recently wire compression was implemented by Alex. It uses well known
>> zlib
>> library. On Linux zlib could be installed as a standalone package and there
>> is no problems w
On 11/28/14 15:34, Thomas Steinmaurer wrote:
>> Recently wire compression was implemented by Alex. It uses well known
>> zlib
>> library.
> Have you guys considered LZ4? https://code.google.com/p/lz4/
>
> It is getting very popular in the big-data / NoSQL area for both,
> compressing data on
On 28/11/2014 09:39, Vlad Khorsun wrote:
>Hi all.
>
>Recently wire compression was implemented by Alex. It uses well known zlib
> library. On Linux zlib could be installed as a standalone package and there
> is no problems with its presence nor for Firebird users, nor for those who
> going
> Recently wire compression was implemented by Alex. It uses well known zlib
> library.
Have you guys considered LZ4? https://code.google.com/p/lz4/
It is getting very popular in the big-data / NoSQL area for both,
compressing data on disk and over-the-wire.
Regards,
Thomas
On Linux zlib
28.11.2014 12:39, Vlad Khorsun wrote:
> So, i have a couple of questions:
My answers would be
a) No
b) Yes
c) zlib1
IMHO, client and server should handle cases when zlib is not found and
ignore
compression option (with a warning, perhaps).
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