Search results for "meeting" - WLUG

Re: WLUG Meeting Feb 11th 2021! Topic: Good question!

by Jon "maddog" Hall

>More obscure. It has to do with how memory accesses to bytes are >handled on the Alpha architecture. They're not very quick, because >the Alpha wants to do all memory access in 32bit chunks. "Quick" is in the eye of the beholder. Yes, the Alpha tended to access data in 32 bit "chunks" to get it into the registers. Being a RISC processor it was not as rich in data access on a byte level. On the other hand other CISC processors also accessed data on a 32-bit level, just that their instruction sets used microcode to make it look like they were only accessing a byte. The trade off was in executing multiple RISC instructions to one microcoded CISC instruction. Would this bother a kernel developer writing a couple of lines of assembly language down at the very lowest level of the kernel....probably. On the other hand for years Linus talked about the Alpha as the best architecture chip he knew, so it could not have been too bad. md On Thu, Feb 4, 2021 at 5:29 PM John Stoffel <john(a)stoffel.org> wrote: > >>>>> "Keith" == Keith Wright <kwright(a)keithdiane.us> writes: > > Keith> John Stoffel via WLUG <wlug(a)lists.wlug.org> writes: > >> I recall, it's mostly the memory ordering around byte accesses that > >> are the problem. > > Keith> Are you saying that the Big Endian vs Little Endian flame war > Keith> actually had consequences in the Real World? > > It did, and still does. MIPS processors can be BE or LE (Big/Little > Endian) depending on how you configure them as I understand, though > this is more the smaller micro-controllers used in embedded stuff. > > I personally play around with ATTiny85 and ATTiny84 MCUs when I get a > chance. Slowly looking at STM8 and STM32 stuff as well. And of > course the Arduino AVR stuff. > > Keith> Or something even more obscure? > > More obscure. It has to do with how memory accesses to bytes are > handled on the Alpha architecture. They're not very quick, because > the Alpha wants to do all memory access in 32bit chunks. > > I honestly don't recall all the full details. You can find info in > the LKML (Linux Kernel Mailing List) which discuss this over the > years. Looks for Posts by Linus Torvalds which also mention Alpha. > Interesting reading. > >

4 years, 2 months

Re: Hey Everybody! WLUG Meeting this week!

by Gregory Boyce

On Mon, Jun 10, 2024 at 6:01 PM John Stoffel <john(a)stoffel.org> wrote: > >>>>> "Gregory" == Gregory Boyce <gregory.boyce(a)gmail.com> writes: > > > On Mon, Jun 10, 2024, 2:42 PM John Stoffel via WLUG <wlug(a)lists.wlug.org> > wrote: > >>>>>> "Tim" == Tim Keller <turbofx(a)gmail.com> writes: > > >> Currently we're having issues getting the Turing Pi 2 to boot, so > >> doing a show off of Proxmox I could definitely do as well. > > > I'ev got proxmox running at owkr with some basic VMs on it for > > testing. I might be able to show it off doing some basic stuff like > > live migrations. > > > I recently switched my home server to proxmox, and I've been > > spending time using terraform and packer to build and deploy VMs. > > Are you running a cluster or just one system? I've got a three node > cluster at $WORK, but thinking of looking at their SCALE product. But > of course while VMware is going to shaft us pricewise, the manglement > might not want to leave the devil they know. Just a single system at the moment. Another issue is deploying OVA files. I find that ProxMOX is a pain > in terms of .iso and .ova files, you need to first add them into it's > own repository, then you can deploy from them. VMware just lets you > browse for the files and deploy. > Yeah, that makes sense. The interface isn't especially user friendly either. It takes me a while to remember where the interface for uploading ISO files is whenever I need to use it. That's one thing that Scale Computing does well. The interface for uploading images is pretty straightforward, and it will convert images from various formats for you automatically. Other than the current lack of support for compressed images. > Though I also admit that .ova deployments can be annoyingly tough, but > I'm running VCenter 7.0.x and a mix of ESXi 6.7 and 7.0 on my > systems. Legacy hardware which I can't move up. Another reason to > hate vendor designed stuff, it locks you in. > > > I'd be happy to share code if anyone is interested. > > Please do! > This is very much a work in progress as I work on learning the tools. https://gitlab.com/techstoa/proxmox -- Greg

10 months, 1 week

Re: WLUG Meeting Feb 11th 2021! Topic: Good question!

by Robert N. Evans

That is not what I see when I query one of the major name servers. I would guess your server is configured differently... rne@P5:~$ dig @1.1.1.1 isc.org ; <<>> DiG 9.16.1-Ubuntu <<>> @1.1.1.1 isc.org ; (1 server found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 31866 ;; flags: qr rd ra ad; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 1232 ;; QUESTION SECTION: ;isc.org. IN A ;; ANSWER SECTION: isc.org. 9 IN A 149.20.1.66 ;; Query time: 24 msec ;; SERVER: 1.1.1.1#53(1.1.1.1) ;; WHEN: Thu Feb 11 10:03:30 EST 2021 ;; MSG SIZE rcvd: 52 -BE -----Original Message----- >From: Keith Wright via WLUG <wlug(a)lists.wlug.org> >Sent: Feb 11, 2021 1:04 AM >To: Worcester Linux Users' Group General Discussion <wlug(a)lists.wlug.org> >Cc: wlug(a)lists.wlug.org, Andre.Lehovich(a)gmx.com, Keith Wright <kwright(a)keithdiane.us> >Subject: [WLUG] Re: WLUG Meeting Feb 11th 2021! Topic: Good question! > >Andre Lehovich via WLUG <wlug(a)lists.wlug.org> writes: > >>> dig @66.92.74.188 isc.org >> >> Here you go, hope it's useful... > >Thank you. That's a lot of information. > >> quetzal:~ al$ dig @66.92.74.188 isc.org >> >> ; <<>> DiG 9.10.6 <<>> @66.92.74.188 isc.org >> ; (1 server found) >> ;; global options: +cmd >> ;; Got answer: >> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 11995 >> ;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 13, ADDITIONAL: 27 >> ;; WARNING: recursion requested but not available > ^^^^^^^^^ ^^^^^^^^^ ^^^ ^^^ ^^^^^^^^^ >That looks good. >I don't want to be doing recursion for you (nothing personal). > >But where did all the rest of that come from? >I've never seen anything like that! >Did my server send all that? Why?? > >> ;; OPT PSEUDOSECTION: >> ; EDNS: version: 0, flags:; udp: 4096 >> ;; QUESTION SECTION: >> ;isc.org. IN A >> >> ;; AUTHORITY SECTION: >> . 348191 IN NS c.root-servers.net. >> . 348191 IN NS d.root-servers.net. >> . 348191 IN NS e.root-servers.net. >> . 348191 IN NS f.root-servers.net. >> . 348191 IN NS g.root-servers.net. >> . 348191 IN NS h.root-servers.net. >> . 348191 IN NS i.root-servers.net. >> . 348191 IN NS j.root-servers.net. >> . 348191 IN NS k.root-servers.net. >> . 348191 IN NS l.root-servers.net. >> . 348191 IN NS m.root-servers.net. >> . 348191 IN NS a.root-servers.net. >> . 348191 IN NS b.root-servers.net. >> >> ;; ADDITIONAL SECTION: >> a.root-servers.net. 348191 IN A 198.41.0.4 >> a.root-servers.net. 348191 IN AAAA 2001:503:ba3e::2:30 >> b.root-servers.net. 348191 IN A 199.9.14.201 >> b.root-servers.net. 348191 IN AAAA 2001:500:200::b >> c.root-servers.net. 348191 IN A 192.33.4.12 >> c.root-servers.net. 348191 IN AAAA 2001:500:2::c >> d.root-servers.net. 348191 IN A 199.7.91.13 >> d.root-servers.net. 348191 IN AAAA 2001:500:2d::d >> e.root-servers.net. 348191 IN A 192.203.230.10 >> e.root-servers.net. 348191 IN AAAA 2001:500:a8::e >> f.root-servers.net. 348191 IN A 192.5.5.241 >> f.root-servers.net. 348191 IN AAAA 2001:500:2f::f >> g.root-servers.net. 348191 IN A 192.112.36.4 >> g.root-servers.net. 348191 IN AAAA 2001:500:12::d0d >> h.root-servers.net. 348191 IN A 198.97.190.53 >> h.root-servers.net. 348191 IN AAAA 2001:500:1::53 >> i.root-servers.net. 348191 IN A 192.36.148.17 >> i.root-servers.net. 348191 IN AAAA 2001:7fe::53 >> j.root-servers.net. 348191 IN A 192.58.128.30 >> j.root-servers.net. 348191 IN AAAA 2001:503:c27::2:30 >> k.root-servers.net. 348191 IN A 193.0.14.129 >> k.root-servers.net. 348191 IN AAAA 2001:7fd::1 >> l.root-servers.net. 348191 IN A 199.7.83.42 >> l.root-servers.net. 348191 IN AAAA 2001:500:9f::42 >> m.root-servers.net. 348191 IN A 202.12.27.33 >> m.root-servers.net. 348191 IN AAAA 2001:dc3::35 >> >> ;; Query time: 150 msec >> ;; SERVER: 66.92.74.188#53(66.92.74.188) >> ;; WHEN: Wed Feb 10 20:31:08 PST 2021 >> ;; MSG SIZE rcvd: 819 >> >> _______________________________________________ >> WLUG mailing list -- wlug(a)lists.wlug.org >> To unsubscribe send an email to wlug-leave(a)lists.wlug.org >> Create Account: https://wlug.mailman3.com/accounts/signup/ >> Change Settings: https://wlug.mailman3.com/postorius/lists/wlug.lists.wlug.org/ >> Web Forum/Archive: https://wlug.mailman3.com/hyperkitty/list/wlug@lists.wlug.org/message/JBBKO… >_______________________________________________ >WLUG mailing list -- wlug(a)lists.wlug.org >To unsubscribe send an email to wlug-leave(a)lists.wlug.org >Create Account: https://wlug.mailman3.com/accounts/signup/ >Change Settings: https://wlug.mailman3.com/postorius/lists/wlug.lists.wlug.org/ >Web Forum/Archive: https://wlug.mailman3.com/hyperkitty/list/wlug@lists.wlug.org/message/2A6P2…

4 years, 2 months

Re: [Wlug] Wednesday's WLUG - noob question on XML editor

by Lee Keyser-Allen

I found a phenomenal one called the Altova XML Suite which has a free 'home' version (which I've not played with). The version I used was the enterprise one, and it did everything I wanted in an editor, including giving me lots of graphical feedback and it managed schemas and stylesheets in a clean and well organized blend of graphical interpretations and text. The non-free version, however, is very non-free (~$1000 for the 'pro' suite and ~$1800 for the 'enterprise' suite.) I've also used, with some good success, Architag XRay XML editor which had a very good, entirely text based suite that was free. I did have problems that some of the more quirky and poorly defined parts of the schema I was writing worked differently in XRay's native interpreter than in Xerces (or was it Xalan ... it was a little while ago), which I was using to do some validation. I've also heard that oXygen is supposed to be good (although, they didn't have a demo last I looked, so I haven't looked any closer than that.) I'm very interested if others have had good experience with any free (or less non-free) tools. You can find out more about Altova at www.altova.com. Hope that is somewhat helpful ... Lee On 10/7/06, d.maly(a)ieee.org <d_maly(a)charter.net> wrote: > This stuff is new to me, so wanted to dabble a bit before the meeting. > > My question is: what's your favorite editor for XML? > > My past experience with HTML has been with Mozilla editors in Windows, > and I find them to be adequate (and free). > > Thanks, > Doug Maly > > Hi All: > > > > Just wanted to let everyone know that I'm working hard to make my preso at > > this Wednesday's WLUG meeting (October 11) interesting, informative, > > innovative. Something different, without being annoying. > > > > Bring any of your friends that might be interested in data visualization, > > web design, XML, SVG, etc. > > > > During the preso, interrupt me with questions as much as you want, and > > make a mental note where my presentation isn't clear or drags. I'm hoping > > to get as much feedback as possible so that the next time I present this > > topic it will be better. > > > > Thanks, > > Doug > >

18 years, 6 months

Re: [Wlug] Meeting Topic Idea - MythTV

by bkn＠ithryn.net

On Wed, 7 May 2008 08:30:12 -0400, "John Stoffel" <john(a)stoffel.org> wrote: >>>>>> "Eric" == Eric Martin <freak4uxxx(a)gmail.com> writes: > > Eric> I have a mythbox but can't bring it in as my wife would *KILL* > Eric> me. I can however talk about a few things although I don't see > Eric> it going past 20 minutes. If anybody's interested in it I could > Eric> throw something together for a later date... > I also have am mythtv box. Someone was asking about a distro earlier. The latest ubuntu appears to have ivtv support built into the kernel and the lirc code built into the kernel. The former is a driver for the hauppauge tv cards the the latter is for the remote. Until very recently ivtv and lirc were a challenge to get working because it meant you had to recompile your kernel every time something changed. Other challenges for old tube-style TV is to get it to display to the TV correctly. I believe you need a special X11 driver for this. The new LCD TVs are much more friendly when it comes to plugging-in a computer. > > Now my big questions, since I can't make the meeting due to other > commitments, is as follows: > > - do people use their TiVo remotes with Myth? > I use the remote that came with my pvr card. It works really well. I need to use the TV remote to turn the TV on, but once the TV is on, i only use the mythtv remote to control TV. I also use mythtv and the mythtv remote to play DVDs using xine, which is the only media player i could find that has decent DVD menu support. > - anyone hack a TiVo to be a Myth frontend box? > I believe their tv tuners is propriety, but i could be wrong on this. The hauppauge cards are well supported under linux many of them have hardware decoders and encoders which alleviate the load on the CPU for converting the TV streams. > - which capture cards work with Digital cable? > I don't know of any, read more below ... > - does it need to be downstream of the cable box? > Yes. I did set this up at my place just to test it. With my setup using comcast, i had a serial cable plugged into the mythtv box and the cable box. I was able to change the channels on the digital cable box. There is significant lag -- i mean more so than lag than usual digital cable. Since i don't want anything that comes through on the digital channels i just setup the analog side to go to my mythtv box. That gets me all the channels i want. > > I was just at my mom's house and she has a new Sony LCD HD TV. > Realize that my mom is clueless about technology, so much so that they > took advantage of her and sold her a Toshiba HD DVD player too. > Sigh... > ouch. I would definitely take it back, where did she get this? I would go find their manager. that's really absurd. > All she wants is a big screen so she can watch TV and DVDs. That's > it. Now she has to juggle three friggin remotes to do this. A > logitech Harmony remote is in her future I think. :] > As i mentioned above, i only need to use the TV remote to turn the TV on for all other tasks i just use the mythtv remote. A friend of mine has a nice LCD HDTV with mythtv setup (although he only gets standard def TV); he's TV goes into sleep mode with it's been inactive and the mythtv remote will wake the TV up; so he only needs the one remote. > But this just shows how complicated it can be to setup a simple > setup. So, how do people deal with multiple inputs, remotes, > digital/analog cable, etc. > I hope this question is somehow explained above. The remotes that come with the hauppauge PRV cards are well supported under linux. It took me some configuration to get it working, but i can explain that at a later time if necessary; that is if i can remember how to do it; it's been so long. > All in regards to Myth, since when my TiVo finally bites the dust, > I'll need to put something up ASAP to keep the family happy. > i can understand that. It's hard to go back to watching regular TV. - brad

16 years, 11 months

Re: [Wlug] Topics for next meeting (confidence in FOSS decreasing?)

by Tim Keller

Fifteen years ago we were trying to convince our boss to take a chance on replacing that sparc 20 with a linux machine. If back then these vulnerabilities had come to light it would have made our jobs really hard. Thankfully linux has had a decade to prove itself in the server room. At this point the pendulum as swung the other direction. When we have to deploy a windows box we need to think about how it's going to fit into our nice cohesive unix environment. I'd argue that these revelations and the many more to come can be demonstrated that the FOSS community cares about the quality of the software out there and is continuing to improve it. Yeah, this stuff is public, but the openness of our community almost invariably means that lots of dirty laundry ends up on the line for everybody to see. Microsoft has managed to shit show their patching operation so many times it's an easy target to FUD in the other direction. On Thu, Oct 16, 2014 at 1:59 PM, Michael C Voorhis <mvoorhis(a)cs.wpi.edu> wrote: > John Stoffel writes: > > What makes anyone think that closed source model is any better? Just > > look at the number of patches Microsoft, Oracle (Java) and Adobe have > > to release for their products all the time. If they were so much > > better, why do they supply so many patches? > > I certainly do NOT think the closed source model is better. Anyone > who knows how I work will know the extent to which I believe this. > But it is also truthful that all these "events" --heartbleed, the bash > problem, and now TLSv3 (oh yeah, it's called "POODLE") is adding to > the FUD. > > The fact that I can look at sourcecode tips the balance in favor of > FOSS for me certainly, and I assume for most people on this list. But > that doesn't change the fact that the questions are out there. > > So people using/running FOSS in a non-hobby environment should be > prepared to answer questions about it if we consider ourselves to be > advocates. I don't think FOSS confidence is a silly discussion item > for this group. > > --MCV. > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug > -- I am leery of the allegiances of any politician who refers to their constituents as "consumers".

10 years, 6 months

To jordan

by kpoisant＠gmail.com

Socializing isnt a bad idea. Sent from my iPhone On Nov 9, 2009, at 12:00 PM, wlug-request(a)mail.wlug.org wrote: > Send Wlug mailing list submissions to > wlug(a)mail.wlug.org > > To subscribe or unsubscribe via the World Wide Web, visit > http://mail.wlug.org/mailman/listinfo/wlug > or, via email, send a message with subject or body 'help' to > wlug-request(a)mail.wlug.org > > You can reach the person managing the list at > wlug-owner(a)mail.wlug.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Wlug digest..." > > > Today's Topics: > > 1. Re: HSI Vent Maybe Help? (Jordan Wade) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Mon, 9 Nov 2009 09:41:17 -0500 > From: Jordan Wade <jordan.wade(a)gmail.com> > Subject: Re: [Wlug] HSI Vent Maybe Help? > To: Worcester Linux Users Group <wlug(a)mail.wlug.org> > Message-ID: > <7e68ff860911090641g7defa3aak5fd4cdd0bfb4c449(a)mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1 > > I'd be up for some socializing if anyone wants to meet up. Also, I'm > curious, is everyone actually in/around Worcester or do we have lots > of people from farther out too? (I'm in Framingham, for example.) > > Jordan > > On Fri, Nov 6, 2009 at 6:51 PM, ted <x351912(a)gmail.com> wrote: >> Hi WLUG >> >> So here is the info for anyone else who had my problem connecting to >> Verizon for the first time. (I write this for the archives) >> >> The Westell 6100G modem default IP admin and password: >> 192.168.1.1 >> admin >> password >> >> To access the internet and set up your account you have to go to: >> >> http://192.168.1.1/verizon/redirect.htm >> >> "Hidden Redirect Page" >> >> You click the disable button, and then your on the internet. >> >> The tech support guy then insisted on helping me set up my Verizon >> email. Not necessary, but I didn't want to hang up on the guy. >> >> Oh, and does the WLUG go out for beer anytime? (as in non-meeting >> socializing?) >> >> Ted >> >> _______________________________________________ >> Wlug mailing list >> Wlug(a)mail.wlug.org >> http://mail.wlug.org/mailman/listinfo/wlug >> >> > > > ------------------------------ > > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug > > > End of Wlug Digest, Vol 73, Issue 6 > ***********************************

15 years, 5 months

Re: [Wlug] WPI Exchange Help

by Eric Stein

At one point, the UNIX/Exchange battle that goes on between the two servers was so screwed up that all my email was showing up as literal forwards from me to me in my UNIX inbox. I raged at the helpdesk until they accepted that I did not now, nor did I ever want, to even have an exchange account. It took some fighting but I got them to delete my exchange account completely, and my UNIX mail has worked fine ever since. Eric Kurt Snieckus wrote: > On the WPI mail system mail first goes to the unix mail servers, and > then gets forwarded to exchange. If you want you can keep the mail > from being forwarded to exchange by changing the forwarding settings > here: http://www.wpi.edu/Academics/CCC/Services/mailforward.html I > forget exactly what I did, but it didn't work quite right, beacuse > mail sent from other user's exchange accounts went to the exchange > account instead of staying in the unix account. But if you e-mail the > Helpdesk they can fix it for you. This then lets you use imap.wpi.edu > <http://imap.wpi.edu>, pop.wpi.edu <http://pop.wpi.edu>, and > webmail.wpi.edu/squirrelmail <http://webmail.wpi.edu/squirrelmail> > (And i think you can just login to ccc.wpi.edu <http://ccc.wpi.edu> > and type pine and read your mail as well) > If you'd like in-person help the Free Software Association tries to > have meetings at 6pm on Tuesdays in the lounge on the 3rd floor of > Fuller. E-mail owner-fsa(a)wpi.edu <mailto:owner-fsa@wpi.edu> to get > meeting announcements. > -Kurt > > On Tue, Apr 7, 2009 at 11:39 PM, <tedshipper(a)gmail.com > <mailto:tedshipper@gmail.com>> wrote: > > So I'm new to the Linux community and I could use a little help. > I'm trying to setup exchange to work through Evolution Mail on > Ubuntu 8.10. I can't seem to set it up correctly. I feel like i > have all the necessary info like the OWA URL, which I think is > https://exchange.wpi.edu/owa/ . Please advise as to whether I need > to specify the DOMAIN\User which doesn't work or if there is a > better client for setting up exchange at WPI. > Thanks, > > Ship > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org <mailto:Wlug@mail.wlug.org> > http://mail.wlug.org/mailman/listinfo/wlug > > > ------------------------------------------------------------------------ > > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug >

16 years

Re: [Wlug] Oct 24, 2002: Install Fest !

by Michael Frysinger

hell gentoo has ppc and sparc binaries :D -mike ----- Original Message ----- From: "Haines, Charles Allen" <chaines(a)WPI.EDU> To: <wlug(a)mail.wlug.org> Sent: Thursday, September 26, 2002 21:20 Subject: RE: [Wlug] Oct 24, 2002: Install Fest ! > I can install gentoo or slackware. Gentoo has i586 and i686 binaries > now so a base install can be done with no network. > > ----------------------------------------- > Chuck Haines > GDC Systems Administrator > Infinity Complex Developer > WPILA Lab Manager > ----------------------------------------- > AIM: CyberGrex > ICQ: 3707881 > Yahoo: CyberGrex_27 > Cell: (410) 610-6343. > ----------------------------------------- > "Geek by nature, Linux by choice." > > > > -----Original Message----- > From: Andy Stewart [mailto:andystewart@attbi.com] > Sent: Thursday, September 26, 2002 9:18 PM > To: Worcester Linux Users' Group > Subject: [Wlug] Oct 24, 2002: Install Fest ! > > > > HI Everybody, > > I have reserved the HIggins Labs discovery classroom (HL218?) for our > upcoming > install fest! This is scheduled for Thursday, Oct. 24, which is the > night > which was scheduled for our next WLUG meeting. I thought that the first > week > of B term would work out well for the WPI undergraduates. In place of > the > meeting, we'll have the install fest from 6:30 - 9:30 PM (yes, the time > is > earlier for this occasion). I will update the website shortly. > > If you know people who are interested in having us help them with a > Linux > installation, please ask them to send me an e-mail so I can keep track. > We > can probably accomodate folks who want us to configure something but I'd > like > to give priority to installations. Voyeurs are most welcome to watch > and > learn! > > Would somebody from WPILA please post this information on some > appropriate WPI > newsgroups, bulletin boards, and the like? I'd like to give priority to > WPI > students and allow "outsiders" if we have enough space. Remember, we > have > another install fest in February which is open to everybody. > > WLUG / WPILA Linux Install Fest > Date: Thursday, Oct. 24, 2002 > Time: 6:30 - 9:30 PM > E-mail: andystewart(a)attbi.com > > Later, > > Andy > > -- > Andy Stewart, Founder > Worcester Linux Users' Group > Worcester, MA USA > http://www.wlug.org > > > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug > > > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug > >

22 years, 6 months

Re: [Wlug] Meeting topics

by John Stoffel

>>>>> "Jeff" == Jeff Moyer <jmoyer(a)redhat.com> writes: Jeff> Chuck Anderson <cra(a)WPI.EDU> writes: >> On Mon, Mar 01, 2010 at 04:46:44PM -0500, Jim Dibb wrote: >>> On Mon, Mar 1, 2010 at 4:21 PM, Chuck Anderson <cra(a)wpi.edu> wrote: >>>> I'm interested. I was considering using SSDs for my boot drive. Is >>>> RAID protection necessary/advisable using SSDs? >>> >>> SSDs have much higher reliability than HDD. >>> Mirroring is the only RAID level that does not impose a write penalty. >>> Mirroring SSDs is expensive >>> >>> Based on these 3 points, I'd say a backup is a much better solution than >>> RAID, unless you want to (R)AID-0 them into a stripe for even more insane >>> performance. >>> >>> But then again, you didn't state how important your uptime of your system >>> is. Sorry for leaving that bit out.... >> >> Uptime/availability isn't that important, but backups are since RAID >> *is* my backup (plus rsync to other RAIDed systems for the most >> important data). With traditional disk drives, it hasn't been too >> expensive to slap a 2nd system drive in for RAID 1/mirroring. SSDs >> are much more expensive, so if as you say they are more reliable, >> perhaps I can forgo the expense of doing RAID on them. Jeff> I've seen many claims that SSDs are more reliable than Jeff> traditional HDDs, but I haven't seen data to back up those Jeff> claims. Some of the arguements I've read on SSD reliability are quite interesting. If you do the math on how much data you need to write to destroy an SSD with proper (note!) wear levelling, it's really quite high. But I think the real key is to write data to them in blocks of 512 bytes as much as possible, and to not write smaller amounts if at all possible. Jeff> My main concern is that SSDs are still young, so they haven't Jeff> had much soak time. Whether or not the flash is reliable is Jeff> only a small part of the battle. Buggy firmware is a much more Jeff> likely problem at this stage in the game. No single point of Jeff> failure is a good design point when dealing with your data. ;-) I think this is a key issue, the firmware and controllers, not the flash chips themselves. Jeff> I remain cautiously optimistic (though I've already bricked one Jeff> drive). Details? John

15 years, 1 month

WLUG search results for query "meeting"