安装 qemu-img

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安装qemu-img 报依赖：

[root@kolla opt]# rpm -ivh qemu-img-ev-2.6.0-28.el7.10.1.x86_64.rpm error: Failed dependencies:libaio.so.1()(64bit) is needed by qemu-img-ev-10:2.6.0-28.el7.10.1.x86_64libaio.so.1(LIBAIO_0.1)(64bit) is needed by qemu-img-ev-10:2.6.0-28.el7.10.1.x86_64libaio.so.1(LIBAIO_0.4)(64bit) is needed by qemu-img-ev-10:2.6.0-28.el7.10.1.x86_64libgfapi.so.0()(64bit) is needed by qemu-img-ev-10:2.6.0-28.el7.10.1.x86_64libgfapi.so.0(GFAPI_3.4.0)(64bit) is needed by qemu-img-ev-10:2.6.0-28.el7.10.1.x86_64libgfapi.so.0(GFAPI_3.5.0)(64bit) is needed by qemu-img-ev-10:2.6.0-28.el7.10.1.x86_64libgfrpc.so.0()(64bit) is needed by qemu-img-ev-10:2.6.0-28.el7.10.1.x86_64libgfxdr.so.0()(64bit) is needed by qemu-img-ev-10:2.6.0-28.el7.10.1.x86_64libglusterfs.so.0()(64bit) is needed by qemu-img-ev-10:2.6.0-28.el7.10.1.x86_64libiscsi.so.2()(64bit) is needed by qemu-img-ev-10:2.6.0-28.el7.10.1.x86_64librados.so.2()(64bit) is needed by qemu-img-ev-10:2.6.0-28.el7.10.1.x86_64librbd.so.1()(64bit) is needed by qemu-img-ev-10:2.6.0-28.el7.10.1.x86_64libtcmalloc.so.4()(64bit) is needed by qemu-img-ev-10:2.6.0-28.el7.10.1.x86_64

libtcmalloc 竟然还要tcmalloc，让我突然想到了 jemalloc，准备下次编译qemu时使用 jemalloc，提高性能。

解决libtcmalloc依赖，安装 gperftools-libs 及可

解决以上总共出现的依赖，使用下面命令及可解决：

yum install libaio glusterfs-api glusterfs-libs libiscsi librbd1 librados2 gperftools-libs

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