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| For 2023 - we are now fully retired from IT training. We have made many, many friends over 25 years of teaching about Python, Tcl, Perl, PHP, Lua, Java, C and C++ - and MySQL, Linux and Solaris/SunOS too. Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own risk. Lisa and I (Graham) now live in what was our training centre in Melksham - happy to meet with former delegates here - but do check ahead before coming round. We are far from inactive - rather, enjoying the times that we are retired but still healthy enough in mind and body to be active! I am also active in many other area and still look after a lot of web sites - you can find an index ((here)) |
Regular Expressions in hardware
If you're looking to match a large
numbe of strings against a regular expression - for example in a networking or telecom application such as packet switching or a firewall - you might want to look at a hardware
rather than a software solution.
Safenet offer Regular Expression Coprocessors which they are targetting at (I quote) "High speed intrusion detection systems, packet classification, server load balancing, web-switching, bio-informatics, SANs, firewall load balancing and virus scanning".
The Perl "flavour" of regular expressions is used, though with a few differences that have been carefully considered to fit packet rather than text file applications. For example, the new line character has huge significance in most data files, but is just a regular part of the data stream in packet analysis applications.
Safenet's product is a chip, and anyone who purchases a chip involves themselves in a substantial development process to harness the power within an application. For customers with a quantity requirement, the approach seems attractive.
Note - Information on this page is based on data supplied to us by Raqia Networks Inc. (since taken over by Safenet), and should be read only as a review.
Safenet offer Regular Expression Coprocessors which they are targetting at (I quote) "High speed intrusion detection systems, packet classification, server load balancing, web-switching, bio-informatics, SANs, firewall load balancing and virus scanning".
The Perl "flavour" of regular expressions is used, though with a few differences that have been carefully considered to fit packet rather than text file applications. For example, the new line character has huge significance in most data files, but is just a regular part of the data stream in packet analysis applications.
Safenet's product is a chip, and anyone who purchases a chip involves themselves in a substantial development process to harness the power within an application. For customers with a quantity requirement, the approach seems attractive.
Note - Information on this page is based on data supplied to us by Raqia Networks Inc. (since taken over by Safenet), and should be read only as a review.
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