Release Notes: IBM Aspera Sync 3.7.3 for AIX

Product Release: March 21, 2017
Release Notes Updated: March 21, 2017

This release of IBM Aspera IBM Aspera Sync for AIX provides the new features, fixes, and other changes listed below. Additional sections cover system requirements and known problems.


  • Sync is now documented for AIX. Below are highlights of new Sync functionality. For more information, see the IBM Aspera Sync Admin Guide 3.7.3 for AIX.
  • On machines with Unix-based operating systems, a new value, inode, is available for the --dedup option. In this mode, when two or more source files have matching inodes, a hardlink is created between them on the target and the target files have matching inodes.
  • Sync with S3 is now supported and documented.
  • Improved Sync shutdown process when a Sync session is stopped.
  • Sync sessions can now be filtered using the <filter> configuration in aspera.conf. Command line filters are applied after aspera.conf settings. If filtering is not always desired, configure filters for one user. Sync sessions run by that user are filtered while sync session run by other users are not.
  • Sync now supports access key authentication. Access keys provide an alternative to the security credentials of a node user or system user. Because an access key is restricted to its own storage (local or cloud), it allows access control and usage reporting to be segregated by storage. This offers significant benefits to multi-tenant service providers and enterprise installations with multiple departments. This also allows async to run on Aspera Files and for other REST-ful applications.
  • A new asyncadmin option prints file attributes (mtime, recursive mtime for directories, and checksum).
  • Sync now preserves POSIX attributes in the event that file attributes change but file contents do not (times, UID, GID).
  • The new recursive mtime option enables the exclusion of directories and files older than a configured timestamp.
  • The new --delete-delay option allows the delete operations in a unidirectional sync to be delayed until the end of the synchronization.
  • When using the --keep-dir-local or --keep-dir-remote options, locating the keep-dir under the same directory as the sync directory is no longer an error condition as long as the keep-dir has been added to the exclude list.
  • The Async library now takes a license as a parameter. If the library doesn't get a license on initialization, it can still search for one on the disk, as it does currently.
  • async now accepts external cookies, tags, and reports through management.
  • Sync has the following new options:
    Verify local/remote file system is mounted by the existence of this file. NOTE: Use of this feature will increase the time to synchronize deletes.
    The maximum number of pending files to allow. Default is 2000.
    Specify method used to compress a file before transfer. mode can be zlib or none. The default value is none.
    Specify intervals for dedicated transfer threads. number corresponds to the number of threads used to process files smaller or equal to the specified size. If no size is specified, infinity is used as an upper bound.
    Remove source files after they are transferred correctly.
    Enable periodic scans. duration defines the interval between periodic scans. durationmay be specified as DDd HH:MM:SS.mmm or NNw NNd NNh NNm NNs NNms NNus.
    Enable periodic scans on the remote machine.
  • Sync also has three new options for preserving timestamps:
    Preserve file access time.
    Preserve file modification time.
    Preserve file creation time (Windows only).


Note: This release contains tickets created from different tracking systems. For this reason, the ticket IDs may reflect different numbering formats.

ES-131 - The installer changes permission on system-level directories. (CIM-208)

WAT-449 - Sync does not respect the cooloff option.


AIX: 6.1, 7.1


aix: aspera-sync-
md5: 96ebc00e37e819398ac4c984d287e864
sha1: 5eddf8e79ff054d2e4d685a43125bbe6cec72ac4


Note: This release contains tickets created from different tracking systems. For this reason, the ticket IDs may reflect different numbering formats.


Async on AIX does not support continuous PUSH or BIDI modes.

ES-238 - When a client-side asyncsession is forced to quit, in rare cases the server-side asyncprocess may not stop. (CIM-364)

ES-92 - Sync reports incorrect counts for 'deleted_paths', 'deleted_bytes', and 'cumulative_deleted_bytes'.

ES-50 - When using local storage for Sync with Files on Unix-based systems, Sync fails if the access key storage does not start with "/". For example, data/storage fails but /data/storage is successful.

WAT-512 - The --overwrite older option does not recognize modified files if the size has not changed and they are in storage that does not support sparse checksums, such as Azure cloud storage, or when async is run with the --checksum none option.

WAT-465 - Sync hangs following a TCP impairment that produces a libssh2 timeout or error.

WAT-377 (#27391) - [Unix-based OS] A continuous async session configured to follow symlinks will not sync a symlink file after it has been modified.

WAT-362 (#24812) - If a file's size decreases during a continuous Sync push, the file remains pending and is never synced.

WAT-288 (#27311) - An --apply-local-docroot pull copies the local docroot path into the same path. For example, /home/user1/sync is copied into /home/user1/sync.

WAT-9 - When the scan-file-rename option is used with asperawatchd, moved files should be detected and renamed at the destination, not deleted and replaced by a transferred, renamed file.

#29038 - Using overwrite=always when syncing with cloud storage does not overwrite the file. The default checksum behavior with S3 (as with any cloud storage) is "none". An existing file on S3 is considered identical to the local file when their sizes are equal. Therefore the file on S3 is not overwritten, even when the content of S3 differs from the content of the local file.

#28887 - When a file or directory is moved using the --exclude command in Sync continuous mode, the old file or directory is not removed from the remote side.

#28817 - The Sync log entry for SYNCERROR_DELAY does not include information describing the file name and path.

#27621 - Sync conflicts due to handling of hidden, temporary, or transient files (such as those created by Microsoft Office products).

#25915 - When the sync function is set to continuous, overwriting an existing file on the initiating node may result in the deletion of the previous version of the file on the responding node.Workaround: Perform the sync manually to recreate the deleted file.

#24805 - For a synced directory, while all of the files and subdirectories under the source folder will have ACL preserved at destination, the ACL for the source folder itself will not be replicated to the remote destination folder.

#23954 - When the --preserve-acls or --preserve-xattrs option is used, async will not preserve the acl or xattr when either file acl or xattr is modified and (a) file content is unmodified or (b) file content is unmodified and the file is renamed.

#23400 - [Unix-based OS] As of Sync version 1.5+, the user is permitted to sync to the root directory.

#23004 - Console does not draw a line between the involved nodes for an async transfer. This issue occurs when using two managed nodes with two interfaces on two different networks.

#22633 - Sync does not support large xattr/ResourceForks.

#22044 - asyncadmin reports all sessions locked after the last actual running session.

#21014 - When creating a file with vi during a sync, the swap file is in conflict.

#20906 - async can't create a watch on an unreadable directory; therefore, it does not get notified when permissions change. In addition, async treats an unreadable directory as "skip" rather than reporting an error or conflict.

#20767 - -R log dir creation from Linux to Windows with spaces in the path will only get as far as the first space in the path.

#20347 - Async reports errors and conflicts for deep directory depth when the sync is from Linux to Windows.

#19945 - asyncadmin creates SHM and WAL files for read-only operations. Once asyncadmin is run as the root, async run by the user does not have permission to access the existing SHM and WAL files and thus async fails. This is due to a bug in SQLite.

#16911 - Characters in the async session option that are not preceded by a "-" or "--" are ignored, therefore failing to trigger an error message. Any session options specified (such as -lor -a) after the string of characters not preceded by a "-" or "--" are also ignored. The session will still run, using the default values, without notifying the user that the command line settings have not been applied.

#13761 - If filenames contain "\" or new line, async will try to transfer but fail, causing the internal transfer queue to become full and the synchronization to stall (or hang after all the other files have completed).

#13645 - When a directory is renamed during transfer, Sync continues running and never completes.


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