Re: [CentOS] heavy IO load when working with sparse files (centos 6.4)

2015-03-31 Thread Dave Johansen
On Wed, Sep 10, 2014 at 9:28 PM, Dave Johansen wrote: > On Mon, Sep 2, 2013 at 12:40 PM, Ron E wrote: > >> Dear List, >> >> We have noticed a variety of reproducible conditions working with sparse >> files on multiple servers under load with CentOS 6.4. >> >> The short story is that processes th

Re: [CentOS] heavy IO load when working with sparse files (centos 6.4)

2014-09-10 Thread dE
On 09/11/14 09:58, Dave Johansen wrote: On Mon, Sep 2, 2013 at 12:40 PM, Ron E wrote: Dear List, We have noticed a variety of reproducible conditions working with sparse files on multiple servers under load with CentOS 6.4. The short story is that processes that read / write sparse files wit

Re: [CentOS] heavy IO load when working with sparse files (centos 6.4)

2014-09-10 Thread Dave Johansen
On Mon, Sep 2, 2013 at 12:40 PM, Ron E wrote: > Dear List, > > We have noticed a variety of reproducible conditions working with sparse > files on multiple servers under load with CentOS 6.4. > > The short story is that processes that read / write sparse files with > large "holes" can generate an

[CentOS] heavy IO load when working with sparse files (centos 6.4)

2013-09-02 Thread Ron E
Dear List, We have noticed a variety of reproducible conditions working with sparse files on multiple servers under load with CentOS 6.4. The short story is that processes that read / write sparse files with large "holes" can generate an IO storm. Oddly, this only happens with holes and not