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Cloudmark Cartridge Installation and Administration Guide Chapter 4
20 Data files
Data files
The Cloudmark service currently generates new versions of the full micro-
updates data files at intervals designed to balance bandwidth usage with the
required amount of updates. Delta updates are generated at more frequent
intervals to complement the micro-updates files.
! New files will only be generated if new data is available.
Micro-updates consist of the file types listed below:
metadata files The metadata files have extensions of .mfl, .mpl, .rplv1, .dpl,
.awl, .ipl, .implv1, .csl, .fsl, .xrl, .cfg, or .cksum.txt.
state files The etc/micro-updates/state directory contains files that track the
state of the micro-update file set: srl_set.safe, srl_set.unsafe, and srl_set.package.
signature files The signature files have the extension .hs2.z.aes. Delta micro-
updates data are not updated in the hs2.z.aes file. Therefore, the serial number of
the hs2.z.aes file is not updated for each successful delta micro-updates
download. The numerical portion of the zdata.txt file can be higher than the
serial number of the hs2.z.aes file during normal operation.
checksum files There is one checksum file per signature file. These guarantee
the integrity of the data. Each checksum file also contains the decryption key for
its corresponding signature file.
category file This file defines the categories and sub-categories returned by
the Cartridge. See “Message categorization” on page 4.
! This file may be overwritten by micro-updates; do not modify it.
Offline files
At least one micro-update must be downloaded in order for the Cartridge to
operate offline. If the Cartridge is unable to download the next micro-update, the
previous micro-update file set is used.