Hi,
I built a view of 50k records that I need to access. With normal view it is too slow (180 ms), so I
try with hash view that I never used, and the result is even slower !(250 ms) !
(I've just read the new page http://www.equi4.com/mkmapping.html)
Here is what I've done :
c4_View
Riccardo Cohen wrote:
I built a view of 50k records that I need to access. With normal view
it is too slow (180 ms), so I try with hash view that I never used,
and the result is even slower !(250 ms) !
(I've just read the new page http://www.equi4.com/mkmapping.html)
Here is what I've done :
Thanks for your quick answer.
I did try to use only viewhash, for adding. But it did not change.
Here is a sample code you can run (attached)
200ms=time spent on 1 Select() !
I use a pentium 500Mhz
There must be something I dont understand...
Jean-Claude Wippler wrote:
Riccardo Cohen wrote:
I
Riccardo Cohen wrote:
Thanks for your quick answer.
I did try to use only viewhash, for adding. But it did not change.
Weird... try using Find() instead of Select()?
-jcw
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Riccardo Cohen wrote:
c4_View view=db.GetAs(table[key:S,val:S]),selection;
c4_View viewsec=db.GetAs(sec[_H:I,_R:I]);
c4_View viewhash=view.Hash(viewsec,1);
[...]
what's wrong ?? is there any sample code ?
To follow up on this - the demo/ and examples/ subdirs in the MK
Riccardo Cohen wrote:
It worked fine with Find() ;)
Then it comes two questions :
1) Is it normal that select does not use hash ?
2) If I do a SelectRange(), will it use hash ?
It seems you've just answered your own Q's. Think about it: hashing is
by value, not sorted. So select, which uses
Hi,
If you are confused with metakit syntax and structure, like I was at beginning, you may have a look
at http://support.articque.com/metakit/metakit_tutorial.html
It is available also from http://www.equi4.com/mkdocs.html for new users.
Hope this helps.
--
Riccardo Cohen
Articque
Les Roches
I have a database table
table[id:I,name:S]
that I would like to find quickly using either id or name. Is it
possible to have two hash views simultaneously on this table?
I have come up with the following strategy. Take the view and make a
hash for it. Additionally, reproject the view so that
Brian Kelley wrote:
I have a database table
table[id:I,name:S]
that I would like to find quickly using either id or name. Is it
possible to have two hash views simultaneously on this table?
This Q was bound to come up one day ;)
vw = st.getas(table[id:I,name:S])
dvw = vw.project(vw.name,
