Siemens Unix V4.0 - Manual (Page 284)

Advanced Server Registry Advanced Server Key Descriptions
Product Manual U7613-J-Z815-6-76
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MappingSeparator REG_SZ Character string up to 7 characters
Specifies the string that will be appended to the file name before its unique suffix to
indicate that the name is mapped. This value matters only in UNIX system to Windows
NT file name mapping. The default is a tilde (~), the same as in UNIX system to 8.3
mapping, but it is possible to set it to enable the client to easily identify files containing
characters illegal in Windows NT. By default, a file named “my?” will be mapped to
“my_~xyz”. When the value of this key is set to “~asu~”, the name will be mapped to
“my_~asu~xyz”. If an invalid parameter is placed in the Registry, the MappingSeparator
will be replaced by the default value.
Default: ~
You can change the value of this key using the AS/U Administrator.
MaxEASize REG_DWORD 1 - infinity
Specifies the buffer size in bytes that is allocated for extended attributes.
Default: 4096
MaxFileSizeInKB REG_DWORD 100 - infinity
The maximum file size, in KBytes, that Advanced Server will allow a user to create on
the server.
Default: 100000
MaxZeroFillInKB REG_DWORD 0 - infinity
MaxZeroFillInKB controls the amount of space in KB that is zero filled when a client
performs a zero length write. NT clients use zero length writes to pre-allocate disk
space when copying files. On UNIX, disk space is not allocated to an extended file
unless it is physicall written to.
Advanced Server has to write physically to the disk and this takes time within one SMB
request. Some clients might get a timeout while Advanced Server is allocating the disk
space. If a very large file is copied from an NT client to an Advanced Server share and
the file sizes exceeds MaxZeroFillInKB, all of the disk space for that big file will not be
allocated on the Advanced Server machine.
Default: 50000 (50 MB)
MemoryMapFiles REG_DWORD 0 or 1
Specifies whether the server uses the UNIX system mmap system call to memory map
file data into the server's address space for efficiency. File mapping is attempted only
for read-only files.
Default: 1 (memory map read-only files)