Next issue: how many lines of original MVS code has been put in PC instructions? Should those lines of microcode instructions be counted too? They are MVS code, I don't think CFCC of Linux uses them.
Kees. -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of John Eells Sent: 06 September, 2016 15:02 To: [email protected] Subject: Re: z/OS Operating System size Lindy Mayfield wrote: > True, it really is like comparing apples to coconuts when counting lines. > > Also, you introduced another variable, ISPF (and I assume other software > would fit in as well), which I wouldn't have thought to include when trying > to compare the Linux kernel to the z/OS ... ? Nucleus is it called? > > Plus the Linux kernel can be stripped down to bare necessities and the > executable size can be quite small. > > Anyway, it was interesting to hear what people said about this topic, but now > I don't think it's very easy to compare Linux to Windows to z/OS without > going into specific details. <snip> Once Upon A Time... ...it might have been true that the OS nucleus was the operating system in what grew into z/OS. As my first exposure to this OS was an MVS 3.8 SE2 system that was on its way out at the time, I can't say. Today, though, it's not so. These days, critical parts of the OS reside in other data areas (e.g., (E)LPA) and data sets (e.g., linklib). Anyway, I remain highly skeptical of any count of LOC being truly a could of how many LOC there actually are, or how complex or large the resulting "stuff" might be. Apples and coconuts both grow on trees; this is almost like apples to asteroids. ;-) -- John Eells IBM Poughkeepsie [email protected] ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ******************************************************** For information, services and offers, please visit our web site: http://www.klm.com. This e-mail and any attachment may contain confidential and privileged material intended for the addressee only. If you are not the addressee, you are notified that no part of the e-mail or any attachment may be disclosed, copied or distributed, and that any other action related to this e-mail or attachment is strictly prohibited, and may be unlawful. If you have received this e-mail by error, please notify the sender immediately by return e-mail, and delete this message. Koninklijke Luchtvaart Maatschappij NV (KLM), its subsidiaries and/or its employees shall not be liable for the incorrect or incomplete transmission of this e-mail or any attachments, nor responsible for any delay in receipt. Koninklijke Luchtvaart Maatschappij N.V. (also known as KLM Royal Dutch Airlines) is registered in Amstelveen, The Netherlands, with registered number 33014286 ******************************************************** ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
