Re: deduplicating file systems: VDO with Debian?
On Wed, 09 Nov 2022 13:28:46 +0100 hw wrote: > On Tue, 2022-11-08 at 09:52 +0100, DdB wrote: > > Am 08.11.2022 um 05:31 schrieb hw: > > > > That's only one point. > > > What are the others? > > > > > > > And it's not really some valid one, I think, as > > > > you do typically not run into space problems with one single > > > > action (YMMV). Running multiple sessions and out-of-band > > > > deduplication between them works for me. > > > That still requires you to have enough disk space for at least > > > two full backups. > > > I can see it working for three backups because you can > > > deduplicate the first two, but not for two. And why would I > > > deduplicate when I have sufficient disk > > > space. > > > > > Your wording likely confuses 2 different concepts: > > N, I'm not confusing that :) Everyone says so and I don't know > why ... > > > Deduplication avoids storing identical data more than once. > > whereas > > Redundancy stores information on more than one place on purpose to > > avoid loos of data in case of havoc. > > ZFS can do both, as it combines the features of a volume manager > > with those of a filesystem and a software RAID.( I am using > > zfsonlinux since its early days, for over 10 years now, but without > > dedup. ) > > > > In the past, i used shifting/rotating external backup media for that > > purpose, because, as the saying goes: RAID is NOT a backup! Today, i > > have a second server only for the backups, using zfs as well, which > > allows for easy incremental backups, minimizing traffic and disk > > usage. > > > > but you should be clear as to what you want: redundancy or > > deduplication? > > The question is rather if it makes sense to have two full backups on > the same machine for redundancy and to be able to go back in time, or > if it's better to give up on redundancy and to have only one copy and > use snapshots or whatever to be able to go back in time. And the answer is no. The redundancy you gain from this is almost, though not quite, meaningless, because of the large set of common data-loss scenarios against which it offers no protection. You've made it clear that the cost of storage media is a problem in your situation. Doubling your backup server's requirement for scarce and expensive disk space in order to gain a tiny fraction of the resiliency that's normally implied by "redundancy" doesn't make sense. And being able to go "back in time" can be achieved much more efficiently by using a solution (be it off-the-shelf or roll-your-own) that starts with a full backup and then just stores deltas of changes over time (aka incremental backups). None of this, for the record, is "deduplication", and I haven't seen any indication in this thread so far that actual deduplication is relevant to your use case. > Of course it would better to have more than one machine, but I don't > have that. Fine, just be realistic about the fact that this means you cannot in any meaningful sense have "two full backups" or "redundancy". If and when you can some day devote an RPi tethered to some disks to the job, then you can set it up to hold a second, completely independent, store of "full backup plus deltas". And *then* you would have meaningful redundancy that offers some real resilience. Even better if the second one is physically offsite. In the meantime, storing multiple full copies of your data on one backup server is just a way to rapidly run out of disk space on your backup server for essentially no reason. Cheers! -Chris
kernel-image-2.6: ipv6 modul entfernen
Hallo, seit neuestem bin ich von selbstgedrehten kernels umgestiegen auf kernel-image-2.6-k7. Seitdem brauchen alle Programme, die tcp/ip Verbindungen aufbauen, erstmal eine Verschnaufpause, in der sie versuchen, zu ipv6-Adressen zu verbinden. Was natürlich nicht klappt, weil ich kein ipv6 habe (wer hat das schon)... Ich würde deshalb gerne das ipv6-modul aus dem kernel entfernen, habe aber keine Ahnung, wie (ich weiß ja noch nichtmal, warum es überhaupt geladen wird). Vorschläge? Hat das vielleicht etwas mit dem interface 'sit0' zu tun, das auf mysteriöse Weise zusammen mit kernel-image-2.6-k7 aufgetaucht ist? -- Simon Eilting
Re: Eclipse
redbrick escreveu: Still, não sei se vc já conseguiu resolver esse problema, mas recentemente tive problemas com o eclipse, e só consegui resolver o problema depois que instalei uma lib do GTK: # apt-get install libgtk2.0-0 Redbrick; Ontem eu fiz uma atualização do unstable e o eclipse voltou a funcionar. Antes eu já havia feito essa atualização que vc sugeriu, mas não tinha surtido efeito. De qualquer forma, valeu pelo toque. []'s, Still
Re: Iptables.
Gilberto Villani Brito escreveu: Hi group; I would like know how can I use in my Debian (Woody) iptables -m string --string??? My kernel don't support this. PS: Sorry for my english. Gilberto; Acho que vc se confundiu. Essa lista é para usuários da nossa língua mesmo, o bom e velho português. Respondendo à sua dúvida, vc deve habilitar o iptables no kernel antes de mais nada. Se vc estiver usando o kernel 2.2.XX, vc deverá instalar o kernel 2.4.XX, pois, se não me engano, o 2.2.XX não suporta o iptables. []'s, Still
Re: como utilizar compilador java?
Rafael; Para compilar arquivos *.java, use javac programa.java e depois use o java para executar o programa. Existem alguns IDE's como o Eclipse, JBuilder, Netbeans, etc..: Os dois últimos são proprietários. []'s, Still [EMAIL PROTECTED] escreveu: instalei o compilador java 1.4 no kurumin pelo apt-get. mas agora nao sei como faco para compilar algum codigo. existe algum programa modo grafico para isso? obrigado! Rafael -- Use o melhor sistema de busca da Internet Radar UOL - http://www.radaruol.com.br -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: Mplayer não toca som somente imagem
Sávio; Veja a saída do ps ax. Se o artsd estiver rodando, dê um kill no processo e tente rodar o mplayer novamente. []'s, Still Savio Ramos escreveu: Olá, O Mplayer não tem som, somente exibe a imagem. Parece brincadeira pois o VLC não exibe imagem só som... Mensagem abaixo. Alguma luz? Sávio. [EMAIL PROTECTED]:~$ mplayer prodigy90_med.mpg Using GNU internationalization Original domain: messages Original dirname: /usr/share/locale Current domain: mplayer Current dirname: /usr/share/locale MPlayer 0.90rc5-3.2.3 (C) 2000-2003 Arpad Gereoffy (see DOCS) CPU: Advanced Micro Devices Athlon TB Thunderbird (Family: 6, Stepping: 2) Detected cache-line size is 64 bytes MMX2 supported but disabled CPUflags: MMX: 1 MMX2: 0 3DNow: 1 3DNow2: 1 SSE: 0 SSE2: 0 Compiled for x86 CPU with extensions: MMX 3DNow 3DNowEx SSE Reading config file /etc/mplayer/mplayer.conf Reading config file /home/savio/.mplayer/config Reading /home/savio/.mplayer/codecs.conf: can't open '/home/savio/.mplayer/codecs.conf': Arquivo ou diretório não encontrado Reading /etc/mplayer/codecs.conf: 50 audio 136 video codecs font: can't open file: /home/savio/.mplayer/font/font.desc Font /usr/share/mplayer/font/font.desc loaded successfully! (206 chars) Failed to open /dev/rtc: Permissão negada (mplayer should be setuid root or /dev/rtc should be readable by the user.) Using usleep() timing Can't open input config file /home/savio/.mplayer/input.conf : Arquivo ou diretório não encontrado Input config file /etc/mplayer/input.conf parsed : 52 binds Opening joystick device /dev/input/js0 Can't open joystick device /dev/input/js0 : Permissão negada Can't init input joystick Setting up LIRC support... mplayer: could not connect to socket mplayer: Arquivo ou diretório não encontrado Failed to open LIRC support. You will not be able to use your remote control. Playing prodigy90_med.mpg Cache fill: 7,03% (73728 bytes)MPEG-PS file format detected. VIDEO: MPEG1 352x240 (aspect 12) 29,97 fps0,0 kbps ( 0,0 kbyte/s) == Opening audio decoder: [mp3lib] MPEG layer-2, layer-3 MP3lib: init layer23 finished, tables done AUDIO: 44100 Hz, 2 ch, 16 bit (0x10), ratio: 8000-176400 (64,0 kbit) Selected audio codec: [mp3] afm:mp3lib (mp3lib MPEG layer-2, layer-3) == vo: X11 running at 1024x768 with depth 24 and 32 bpp (:0.0 = local display) == Opening video decoder: [mpegpes] MPEG 1/2 Video passthrough VDec: vo config request - 352 x 240 (preferred csp: Mpeg PES) Could not find matching colorspace - retrying with -vop scale... Opening video filter: [scale] The selected video_out device is incompatible with this codec. VDecoder init failed :( Opening video decoder: [libmpeg2] MPEG 1/2 Video decoder v2.0 libmpeg2: Using MMX for IDCT transform libmpeg2: Using 3DNOW for motion compensation VDec: vo config request - 352 x 240 (preferred csp: Planar YV12) VDec: using Planar YV12 as output csp (no 0) Movie-Aspect is 1,33:1 - prescaling to correct movie aspect. VO: [x11] 352x240 = 352x264 Planar YV12 Using MMX for colorspace transform SwScaler: using unscaled Planar YV12 - BGR 32-bit special converter Selected video codec: [mpeg12] vfm:libmpeg2 (MPEG 1 or 2 (libmpeg2)) == Checking audio filter chain for 44100Hz/2ch/16bit - 44100Hz/2ch/16bit... AF_pre: af format: 2 bps, 2 ch, 44100 hz, little endian signed int AF_pre: 44100Hz 2ch Signed 16-bit (Little-Endian) SDL: Samplerate: 44100Hz Channels: Stereo Format Signed 16-bit (Little-Endian) SDL: Unable to open audio: No available audio device Could not open/initialize audio device - no sound. Audio: no sound Starting playback... Fatal signal: Broken Pipe (SDL Parachute Deployed) O sinal fatal foi Ctrl+c acionado por mim! -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: O que é isto?
Alan; Dê uma olhada no seu /etc/cron.x e veja que existem vários processos automáticos rodados diariamente. Eu retirei alguns, pois não os achei muito necessários. Para saber mais, man cron e man crontab. []'s, Still Alan Carvalho escreveu: Olá, meu computador está um pouco estranho, quando ligo daí alguns minutos ele começa acessar o HD e o desempenho fica insustentável, uma carroça. Para resolver isto eu digito: ps ax e encontro: find / /dev/shm -xdev ( -false ) -prune -o ( -type f Então mato o processo e tudo volta ao normal. O que é isto, algum trojan, virus ou apenas alguma programa normal que é executado periodicamente? Além do pstree, existe alguma técnica para se descobrir qual processo, usuário, que chamou um determinado programa? Ou seja como posso fazer uma auditoria?
