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| author | Kefu Chai <kchai@redhat.com> | 2021-03-12 14:27:29 +0100 |
|---|---|---|
| committer | Kefu Chai <kchai@redhat.com> | 2021-03-12 15:18:10 +0100 |
| commit | 1fab195e91bdaf9993a49f10ad44988b3474c5ff (patch) | |
| tree | 42c6ec14586b35a647054cb72a5381eb29e101c5 /README.md | |
| parent | Merge pull request #40004 from vshankar/wip-cephfs-mirror-symlink-overrun (diff) | |
| download | ceph-1fab195e91bdaf9993a49f10ad44988b3474c5ff.tar.xz ceph-1fab195e91bdaf9993a49f10ad44988b3474c5ff.zip | |
README.md: correct notes on `-j` option
Signed-off-by: Kefu Chai <kchai@redhat.com>
Diffstat (limited to 'README.md')
| -rw-r--r-- | README.md | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/README.md b/README.md index 98596de6d2e..86aab21c169 100644 --- a/README.md +++ b/README.md @@ -62,12 +62,13 @@ be up to 5x slower with some workloads. Please pass "-DCMAKE_BUILD_TYPE=RelWithDebInfo" to do_cmake.sh to create a non-debug release.) -(Note: `ninja` alone will use only one CPU thread, this could take a while. use -the `-j` option to use more threads. Something like `ninja -j$(nproc)` would be -a good start. +(Note: the number of jobs used by `ninja` is derived from the the number of +CPU cores of the building host if unspecified. Use the `-j` option to limit +the job number if the build jobs are running out of memory. On average, each +job takes around 2.5GiB memory. This assumes you make your build dir a subdirectory of the ceph.git -checkout. If you put it elsewhere, just point `CEPH_GIT_DIR`to the correct +checkout. If you put it elsewhere, just point `CEPH_GIT_DIR` to the correct path to the checkout. Any additional CMake args can be specified setting ARGS before invoking do_cmake. See [cmake options](#cmake-options) for more details. Eg. |