Re: [DRBD-user] The Problem of File System Corruption w/DRBD

2021-06-07 Thread Eric Robinson
> -Original Message- > From: Gionatan Danti > Sent: Sunday, June 6, 2021 11:02 AM > To: Eric Robinson > Cc: Robert Altnoeder ; drbd- > u...@lists.linbit.com > Subject: Re: [DRBD-user] The Problem of File System Corruption w/DRBD > > Il 2021-06-04 15:08 Eric Rob

Re: [DRBD-user] The Problem of File System Corruption w/DRBD

2021-06-06 Thread Gionatan Danti
Il 2021-06-04 15:08 Eric Robinson ha scritto: Those are all good points. Since the three legs of the information security triad are confidentiality, integrity, and availability, this is ultimately a security issue. We all know that information security is not about eliminating all possible risks,

Re: [DRBD-user] The Problem of File System Corruption w/DRBD

2021-06-04 Thread Eric Robinson
> -Original Message- > From: drbd-user-boun...@lists.linbit.com boun...@lists.linbit.com> On Behalf Of Robert Altnoeder > Sent: Friday, June 4, 2021 6:15 AM > To: drbd-user@lists.linbit.com > Subject: Re: [DRBD-user] The Problem of File System Corruption w/DRBD > &g

Re: [DRBD-user] The Problem of File System Corruption w/DRBD

2021-06-04 Thread Robert Altnoeder
On 03 Jun 2021, at 21:41, Eric Robinson wrote: > > It's a good thing that DRBD faithfully replicates whatever is passed to it. > However, since that is true, it does tend to enable the problem of filesystem > corruption taking down a whole cluster. I'm just asking people for any > suggestions

Re: [DRBD-user] The Problem of File System Corruption w/DRBD

2021-06-03 Thread Digimer
On 2021-06-03 3:35 p.m., Eric Robinson wrote: >> Even this approach just moves the SPOF up from the FS to the SQL engine. >> >> The problem here is that you're still confusing redundancy with data >> integrity. To avoid data corruption, you need a layer that understands your >> data at a sufficient

Re: [DRBD-user] The Problem of File System Corruption w/DRBD

2021-06-03 Thread Eric Robinson
drbd-user-boun...@lists.linbit.com On Behalf Of Yanni M. Sent: Thursday, June 3, 2021 2:21 PM Cc: drbd-user@lists.linbit.com Subject: Re: [DRBD-user] The Problem of File System Corruption w/DRBD As others already mentioned the job of DRBD is to faithfully and accurately replicate the data from

Re: [DRBD-user] The Problem of File System Corruption w/DRBD

2021-06-03 Thread Eric Robinson
> -Original Message- > From: drbd-user-boun...@lists.linbit.com boun...@lists.linbit.com> On Behalf Of Digimer > Sent: Thursday, June 3, 2021 11:43 AM > To: Robert Sander ; drbd- > u...@lists.linbit.com > Subject: Re: [DRBD-user] The Problem of File System Corruption

Re: [DRBD-user] The Problem of File System Corruption w/DRBD

2021-06-03 Thread Yanni M.
As others already mentioned the job of DRBD is to faithfully and accurately replicate the data from the layers above it. So if there's a corruption on the filesystem above the DRBD layer then it will happily do it for you, same way as RAID1 would do it on a pair of hdds. If you want to reduce the

Re: [DRBD-user] The Problem of File System Corruption w/DRBD

2021-06-03 Thread Eric Robinson
> -Original Message- > From: drbd-user-boun...@lists.linbit.com boun...@lists.linbit.com> On Behalf Of Eddie Chapman > Sent: Thursday, June 3, 2021 1:11 PM > To: drbd-user@lists.linbit.com > Subject: Re: [DRBD-user] The Problem of File System Corruption w/DRBD >

Re: [DRBD-user] The Problem of File System Corruption w/DRBD

2021-06-03 Thread Eddie Chapman
On 03/06/2021 13:50, Eric Robinson wrote: -Original Message- From: Digimer Sent: Wednesday, June 2, 2021 7:23 PM To: Eric Robinson ; drbd-user@lists.linbit.com Subject: Re: [DRBD-user] The Problem of File System Corruption w/DRBD On 2021-06-02 5:17 p.m., Eric Robinson wrote: Since

Re: [DRBD-user] The Problem of File System Corruption w/DRBD

2021-06-03 Thread Digimer
On 2021-06-03 11:09 a.m., Robert Sander wrote: > Hi, > > Am 03.06.21 um 14:50 schrieb Eric Robinson: > >> Yes, thanks, I've said for many years that HA is not a replacement for >> disaster recovery. Still, it is better to avoid downtime than to recover >> from it, and one of the main ways to ac

Re: [DRBD-user] The Problem of File System Corruption w/DRBD

2021-06-03 Thread Robert Sander
Hi, Am 03.06.21 um 14:50 schrieb Eric Robinson: > Yes, thanks, I've said for many years that HA is not a replacement for > disaster recovery. Still, it is better to avoid downtime than to recover from > it, and one of the main ways to achieve that is through redundancy, > preferably a shared-n

Re: [DRBD-user] The Problem of File System Corruption w/DRBD

2021-06-03 Thread Eric Robinson
> -Original Message- > From: Digimer > Sent: Wednesday, June 2, 2021 7:23 PM > To: Eric Robinson ; drbd-user@lists.linbit.com > Subject: Re: [DRBD-user] The Problem of File System Corruption w/DRBD > > On 2021-06-02 5:17 p.m., Eric Robinson wrote: > > Since DRBD

Re: [DRBD-user] The Problem of File System Corruption w/DRBD

2021-06-02 Thread Digimer
On 2021-06-02 5:17 p.m., Eric Robinson wrote: > Since DRBD lives below the filesystem, if the filesystem gets corrupted, > then DRBD faithfully replicates the corruption to the other node. Thus > the filesystem is the SPOF in an otherwise shared-nothing architecture. > What is the recommended way (

[DRBD-user] The Problem of File System Corruption w/DRBD

2021-06-02 Thread Eric Robinson
Since DRBD lives below the filesystem, if the filesystem gets corrupted, then DRBD faithfully replicates the corruption to the other node. Thus the filesystem is the SPOF in an otherwise shared-nothing architecture. What is the recommended way (if there is one) to avoid the filesystem SPOF probl