java - How to speed up IndexReader.open -


when use directoryreader.open open directory of on 100g,but opened long time.(lucene 4.2) can advise me policy/optimization should use speed readers open? perhaps when indexing should noted.

maybe i'm not clear enough description.

every day more 70 million data indexed. each index database storage space 40g.
if retrieval support within 1 month.(30*40g,in fact need support longer)i have open indexreader, add them multireader , reuse them.open them slow.i know set indexwriter's mergefactor values. (large values speed indexing increase number of files need opened simultaneously.)i can set small value optimize.are there other parameters or solutions.

opening indexreader costly operation. it's better keep same indexreader around , reuse it. can keep current calling directoryreader.openifchanged:

indexreader newreader = directoryreader.openifchanged(oldreader) if (newreader == null) {     readertouse = oldreader; } else {     readertouse = newreader;     oldreader.close(); //make sure close old one!!

even when there changes index , new reader generated, still lot less costly directoryreader.open.


Comments

Post a Comment

Popular posts from this blog

linux - xterm copying to CLIPBOARD using copy-selection causes automatic updating of CLIPBOARD upon mouse selection -

i've tried various ways coerce xterm (versions 285 , 292) copy selection clipboard clipboard whenever press ctrl-shift-c. promising way far has been, in ~/.xresources, put this: xterm*vt100.translations: #override \ ctrl shift <keypress> c: copy-selection(clipboard) \n\ ctrl shift <keypress> v: insert-selection(clipboard) ctrl-shift-v works perfectly, copying has nuance... if restart xterm, highlighting text puts things in primary clipboard; expected, proper, default behavior. if hit ctrl-shift-c, copies current selection clipboard clipboard. the bug, however, if highlight text after first time pressed ctrl-shift-c, you'll see highlighting copies both primary and clipboard. cannot figure out how stop xterm updating clipboard upon selection... , doesn't make sense me in first place. i said, @ specific point in time, copy selection clipboard... yet starts updating automatically upon selection after doing once... anyone have workaround...
Read more

c++ - qgraphicsview horizontal scrolling always has a vertical delta -

Image
i've subclassed qgraphicsview custom canvas used in cad application. i've reimplemented qgraphicsview::wheelevent check keyboard modifiers control key and, if control key pressed, zoom. i'm trying implement horizontal scroll when user holds shift , uses wheel. the problem i'm having horizontal scrolling always scrolls 0.279. not huge problem, hugely annoying , points else being wrong. so, here questions: is right way implement horizontal scrolling? if not, is? how eliminate delta of 0.279? thanks in advance. code , sample output below void myview::zoom(int delta) { double factor = pow(1.2, delta/abs(delta)); this->scale(factor, factor); } void myview::scrollhorizontal(int level) { qpointf center = maptoscene(viewport()->rect().center()); qdebug() << "center: " << center.x() << ", " << center.y(); centeron(qpointf(center.x() - level, center.y())); } void myview::wheelevent(qwheeleve...
Read more