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[Õ½ÚÒ³Âë]:6.51 P82 4.5 P34
[Ô­ÎÄÄÚÈÝ]:
6.51 P82
VASP currently overs parallelization (and data distribution) over bands and parallelization (and data distribution) over plane wave coeffcients (see also Section 4). To get a high effciency on massively parallel systems it is strongly
recommended to use both at the same time. The only algorithm which works with the over band distribution is the RMM-DIIS iterative matrix diagonalization (IALGO=48). NPAR tells VASP to switch on parallelization (and data distribution) over bands. NPAR=1 implies distribution over plane wave coeffcients only (IALGO=8 and IALGO=48 both work), All nodes will work on each band. We suggest to use this default setting only when running on a small number of nodes.

4.5 P34
Partial local DOS is only supported with parallelization over plane wave coefficients but not with parallelization over bands. The reason is that some files (like PROCAR) have a rather complicated band-by-band layout, and it would be complicated to mimic this layout with a data distribution over bands.

6.33  P69
The parallel version has some restrictions: The site projected DOS is not evaluated in the parallel version in
the following cases:
VASP.4.5, NPAR!=1, no site projected DOS
VASP.4.6, NPAR!=1, LORBIT=0-5   no site projected DOS
("!=" ±íʾ²»µÈÓÚ)

[ÎÊÌâ]:ÕâÁ½¶Î»°ÊǹØÓÚ²¢ÐÐÒÔ¼°²úÉúPDOS(partial local DOS)µÄÉèÖõÄ.

(1)NPAR=1±íʾparallelization over plane wave coefficients;>1 ±íʾover bands?ÈçºÎÉèÖÃʹµÃparallelization both of the same time?
(2)RMM-DIIS(IALGO-48)ÊÇΨһ֧³Öparallelization over bandsµÄËã·¨?ÄÇÕâÑùµÄ»°Ö»ÎÞÂÛÊǵ¥¶Àparallelization over band »¹ÊÇͬʱover plane wave over coefficients,µç×Óµü´ø¶¼Ö»ÄÜÓÃIALGO=48?
(3)Òª¼ÆËãPDOSÖ»ÄÜÉèÖÃNPAR=1?  Ö»¼ÆËãDOSµÄ»°²»±ØÖ»Ñù°É?
(4)ÈçºÎÉèÖÃLPLANE?¶Ô¼ÆËãÓÐʲôÑùµÄÓ°Ïì?
(5)ÒªÉú³É site projected DOS(SPDOS) ,±ØÐëÉèÖÃNPAR=1? SPDOSÓëPDOSÊÇͳһ¸ÅÄîÂð?

[ Last edited by cenwanglai on 2010-6-5 at 12:25 ]
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