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Add fallocate manpage
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.TH FALLOCATE 1 ubase-VERSION
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.SH NAME
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\fBfallocate\fR - preallocate blocks to a file
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.SH SYNOPSIS
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\fBfallocate\fR [\fB-o\fI offset\fR] \fB-l\fR \fIlength file\fR
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.SH DESCRIPTION
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\fBfallocate\fR preallocates blocks to a file. Only certain filesystems
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support the fallocate system call. This is a very fast operation to allocate
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uninitialized blocks in a file without doing any IO.
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As of the Linux Kernel v2.6.31, the fallocate system call is supported
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by the btrfs, ext4, ocfs2, and xfs filesystems.
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.SH OPTIONS
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.TP
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\fB-o\fR Specifies the beginning offset of the allocation, in bytes.
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.TP
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\fB-l\fR Specifies the length of the allocation, in bytes.
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.SH SEE ALSO
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fallocate(2)
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