https://community.sap.com/t5/technology-q-a/encoding-and-decoding-methods-for-backup-compression-and-decompression/qaa-p/13827737#M4858580 <P>Backups in SQL Anywhere are basically a 'page for page' backup. No extra encryption or compression is performed. </P> <P>If the source database is already encrypted then the database file pages will be encrypted 'over the wire' and at the destination; and no decryption is performed at any point during the backup.</P> <P>For transaction logs, unused pages at the end of the file will not be copied so the destination copy can be smaller by that amount. For database files, depending upon the nature of the backup, checkpoint log pages might also be eliminated; depending upon which <A href="http://dcx.sap.com/index.html#sqla170/en/html/3be44e416c5f1014a46efaba8b03d439.html">'WITH CHECKPOINT LOG' option</A> you choose (if any). But neither of those are compression, in the normal meaning of that word even the the end result may be a bit smaller.</P> Tue, 31 May 2016 08:49:09 GMT Former Member 2016-05-31T08:49:09Z https://community.sap.com/t5/technology-q-a/encoding-and-decoding-methods-for-backup-compression-and-decompression/qaq-p/13827736 <P>Hello , I am new in that field. My Question is :- what encryption / decryption techniques used BACKUP Compression/DeCompression in SQL Anywhere.</P> <P>Thanks,</P> Tue, 31 May 2016 01:58:06 GMT https://community.sap.com/t5/technology-q-a/encoding-and-decoding-methods-for-backup-compression-and-decompression/qaq-p/13827736 Former Member 2016-05-31T01:58:06Z https://community.sap.com/t5/technology-q-a/encoding-and-decoding-methods-for-backup-compression-and-decompression/qaa-p/13827737#M4858580 <P>Backups in SQL Anywhere are basically a 'page for page' backup. No extra encryption or compression is performed. </P> <P>If the source database is already encrypted then the database file pages will be encrypted 'over the wire' and at the destination; and no decryption is performed at any point during the backup.</P> <P>For transaction logs, unused pages at the end of the file will not be copied so the destination copy can be smaller by that amount. For database files, depending upon the nature of the backup, checkpoint log pages might also be eliminated; depending upon which <A href="http://dcx.sap.com/index.html#sqla170/en/html/3be44e416c5f1014a46efaba8b03d439.html">'WITH CHECKPOINT LOG' option</A> you choose (if any). But neither of those are compression, in the normal meaning of that word even the the end result may be a bit smaller.</P> Tue, 31 May 2016 08:49:09 GMT https://community.sap.com/t5/technology-q-a/encoding-and-decoding-methods-for-backup-compression-and-decompression/qaa-p/13827737#M4858580 Former Member 2016-05-31T08:49:09Z