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<div id="version" align=right><b>petsc-3.10.3 2018-12-18</b></div>
<div id="bugreport" align=right><a href="mailto:petsc-maint@mcs.anl.gov?subject=Typo or Error in Documentation &body=Please describe the typo or error in the documentation: petsc-3.10.3 v3.10.3 docs/manualpages/Vec/VecStashSetInitialSize.html "><small>Report Typos and Errors</small></a></div>
<A NAME="VecStashSetInitialSize"><H1>VecStashSetInitialSize</H1></A>
sets the sizes of the vec-stash, that is used during the assembly process to store values that belong to other processors.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscvec.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../Vec/VecStashSetInitialSize.html#VecStashSetInitialSize">VecStashSetInitialSize</A>(<A HREF="../Vec/Vec.html#Vec">Vec</A> vec,<A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> size,<A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> bsize)
</PRE>
Not Collective, different processes can have different size stashes
<P>
<H3><FONT COLOR="#CC3333">Input Parameters</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>vec </B></TD><TD>- the vector
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>size </B></TD><TD>- the initial size of the stash.
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>bsize </B></TD><TD>- the initial size of the block-stash(if used).
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Options Database Keys</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-vecstash_initial_size <size> or <size0,size1,...sizep</B></TD><TD>- 1>
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-vecstash_block_initial_size <bsize> or <bsize0,bsize1,...bsizep</B></TD><TD>- 1>
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
The block-stash is used for values set with <A HREF="../Vec/VecSetValuesBlocked.html#VecSetValuesBlocked">VecSetValuesBlocked</A>() while
the stash is used for values set with <A HREF="../Vec/VecSetValues.html#VecSetValues">VecSetValues</A>()
<P>
Run with the option -info and look for output of the form
VecAssemblyBegin_MPIXXX:Stash has MM entries, uses nn mallocs.
to determine the appropriate value, MM, to use for size and
VecAssemblyBegin_MPIXXX:Block-Stash has BMM entries, uses nn mallocs.
to determine the value, BMM to use for bsize
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Vec/VecSetBlockSize.html#VecSetBlockSize">VecSetBlockSize</A>(), <A HREF="../Vec/VecSetValues.html#VecSetValues">VecSetValues</A>(), <A HREF="../Vec/VecSetValuesBlocked.html#VecSetValuesBlocked">VecSetValuesBlocked</A>(), <A HREF="../Vec/VecStashView.html#VecStashView">VecStashView</A>()
<BR>
<P>
<P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>intermediate<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/vec/vec/interface/vector.c.html#VecStashSetInitialSize">src/vec/vec/interface/vector.c</A>
<BR><A HREF="./index.html">Index of all Vec routines</A>
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