3/23/2023 0 Comments Stunnel performance![]() Direct Migration enables the migration of persistent volumes and internal images directly from the source cluster to the destination cluster without an intermediary replication repository. Rspamd uses assembly for some frequently used cryptography and hashing algorithms selecting the proper version of code in runtime, relying on CPU instructions set support tests.In MTC 1.4.0, a new feature called Direct Migration is available that will yield significant time savings for most customers migrating persistent volumes and/or internal images. There are many details about hyperscan that are covered in the following slides.Īssembly snippets allow to optimize specific algorithms for targeted architectures. Unlike traditional regexps engines, Hyperscan allows to process multiple expressions at the same time. Hyperscan engine is used in Rspamd to quickly process large regular expressions set. This approach allows to skip unnecessary details and extract information from emails quicker than by using a large set of regular expressions for these purposes. Unlike SA, Rspamd uses specific state machines to parse email components: mime structure, HTML parts, URLs, images, received headers and so on and so forth. You can watch the following slides to get more details about this method. This is achieved by applying local optimizations techniques:ĪST optimizations are used to exclude unnecessary checks from rules. Rspamd uses various methods to speed up each individual message processing stage. Moreover, Rspamd stops processing when a message reaches spam threshold as further checks are likely meaningless. Rspamd prefers to check for rules with higher weight, lower execution time and higher hit rate first. Rules reordering is used to reduce messages processing time.Events driven architecture allows Rspamd to execute network and other slow request simultaneously in the background, allowing to process other messages while waiting for replies:.Global optimizations are used to speed up the overall messages processing improving all filters performance and arranging checks in an optimal order. In the next graph, you can see how switch to Rspamd from SA helped to reduce CPU load on scanner machines:įor faster email processing, Rspamd uses a set of global and local optimization techniques. Rspamd can be treated as a faster replacement for SpamAssassin mail filter with the ability to scan ten times more messages using the same rules (by means of SpamAssassin plugin). You can also check the recent performance analyse article to have a better impression about how fast Rspamd could be. On the other hand, it is possible to run Rspamd even on an embedded device with a very constrained environment. ![]() Rspamd is written in plain C language and it uses a number of techniques to run fast especially on the modern hardware. From the very beginning of the project, Rspamd was oriented on highly loaded mail systems with development focus on performance and scan speed. Rspamd has been started to handle mail flows that has grown over the last decade by more than ten times. OpenBSD Email Service relying on Rspamd.Postfix, Dovecot, Rspamd, and LDAP on FreeBSD.Dovecot, Postfix, MySQL, Rspamd on Debian 9 Stretch.Rspamd fuzzy feed and DNSBL usage policies.Getting feedback from users with IMAPSieve.An alternative introduction to rspamd configuration.Mail self-hosting on FreeBSD using Postfix, Dovecot, Rspamd, and LDAP.Own mail server based on Dovecot, Postfix, MySQL, Rspamd and Debian Stretch. ![]()
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